Android炫酷应用300例读书笔记三
2019-09-29 本文已影响0人
梧叶已秋声
第3章文字
65.使用ScaleXSpan创建扁平风格的文字
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/linear_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:gravity="center">
<TextView
android:id="@+id/text_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
</LinearLayout>
public class MainActivity extends AppCompatActivity {
private TextView mTextView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mTextView = (TextView) findViewById(R.id.text_view);
SpannableString spannableString = new SpannableString("实例锦集");
spannableString.setSpan(new ScaleXSpan(3),0,spannableString.length(),Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
mTextView.setText(spannableString);
}
}
66.使用MaskFilterSpan实现文字边缘模糊
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/linear_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:gravity="center">
<TextView
android:id="@+id/text_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="150sp"/>
</LinearLayout>
public class MainActivity extends AppCompatActivity {
private TextView mTextView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mTextView = (TextView) findViewById(R.id.text_view);
SpannableStringBuilder spannableStringBuilder = new SpannableStringBuilder("炫酷");
MaskFilterSpan maskFilterSpan = new MaskFilterSpan(new BlurMaskFilter(21,BlurMaskFilter.Blur.SOLID));
spannableStringBuilder.setSpan(maskFilterSpan,0,2,Spanned.SPAN_INCLUSIVE_INCLUSIVE);
mTextView.setText(spannableStringBuilder);
}
}
67.使用MaskFilterSpan实现文字中心镂空
public class MainActivity extends AppCompatActivity {
private TextView mTextView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mTextView = (TextView) findViewById(R.id.text_view);
SpannableStringBuilder spannableStringBuilder = new SpannableStringBuilder("炫酷");
MaskFilterSpan maskFilterSpan = new MaskFilterSpan(new BlurMaskFilter(1,BlurMaskFilter.Blur.OUTER));
spannableStringBuilder.setSpan(maskFilterSpan,0,2,Spanned.SPAN_INCLUSIVE_INCLUSIVE);
mTextView.setText(spannableStringBuilder);
}
}
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/linear_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:gravity="center">
<TextView
android:id="@+id/text_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="150sp"/>
</LinearLayout>
68.使用MaskFilterSpan实现文字整体模糊
public class MainActivity extends AppCompatActivity {
private TextView mTextView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mTextView = (TextView) findViewById(R.id.text_view);
SpannableStringBuilder spannableStringBuilder = new SpannableStringBuilder("炫酷");
MaskFilterSpan maskFilterSpan = new MaskFilterSpan(new BlurMaskFilter(15,BlurMaskFilter.Blur.NORMAL));
spannableStringBuilder.setSpan(maskFilterSpan,0,2,Spanned.SPAN_INCLUSIVE_INCLUSIVE);
mTextView.setText(spannableStringBuilder);
}
}
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/linear_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:gravity="center">
<TextView
android:id="@+id/text_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="150sp"/>
</LinearLayout>
69.使用MaskFilterSpan模糊多个字符串
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="@+id/textView"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginLeft="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="16dp"
android:text="关键词："
android:textSize="20sp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toTopOf="parent"/>
<EditText
android:id="@+id/edit_text"
android:layout_width="169dp"
android:layout_height="51dp"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
app:layout_constraintRight_toLeftOf="@+id/button"
app:layout_constraintTop_toTopOf="parent"
/>
<Button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
android:layout_marginTop="8dp"
android:text="Button"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"/>
<TextView
android:id="@+id/textView2"
android:layout_width="300dp"
android:layout_height="400dp"
android:text="微软 [1] （英文名称：microsoft，中文简称：微软公司或美国微软公司）始建于1975年，是一家美国跨国科技公司，也是世界PC（Personal Computer，个人计算机）软件开发的先导，由比尔·盖茨与保罗·艾伦创办于1975年，公司总部设立在华盛顿州的雷德蒙德（Redmond，邻近西雅图）。以研发、制造、授权和提供广泛的电脑软件服务业务为主。"
android:layout_marginLeft="8dp"
app:layout_constraintLeft_toLeftOf="parent"
android:layout_marginRight="8dp"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
android:layout_marginBottom="40dp"
/>
</android.support.constraint.ConstraintLayout>
public class MainActivity extends AppCompatActivity {
private EditText mEditText;
private TextView mTextView;
private Button mButton;
private String mString;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
getWindow().getDecorView().setLayerType(View.LAYER_TYPE_SOFTWARE,null);
mTextView = (TextView) findViewById(R.id.textView2);
mString = mTextView.getText().toString();
mEditText = (EditText) findViewById(R.id.edit_text);
mButton = (Button) findViewById(R.id.button);
mButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
String search =mEditText.getText().toString();
SpannableString spannableString = new SpannableString(mString);
for (int i = 0 ; i< mString.length();i++){
int start = i;
i = mString.indexOf(search,i);
Log.d("MAIN","i = " + i);
if (i<0){
spannableString.setSpan(new MaskFilterSpan(new BlurMaskFilter(8,BlurMaskFilter.Blur.NORMAL)),start+search.length()-1,mString.length(),Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
break;
}
spannableString.setSpan(new MaskFilterSpan(new BlurMaskFilter(8,BlurMaskFilter.Blur.NORMAL)),start+search.length()-1,i,Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
}
mTextView.setText(spannableString);
}
});
}
}
输入文字后，点击button，除了输入的文字之外的文字就会被模糊掉。
70.使用BulletSpan在文本首字前添加小圆点
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/linear_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:gravity="center">
<TextView
android:id="@+id/text_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="30sp"/>
</LinearLayout>
public class MainActivity extends AppCompatActivity {
private TextView mTextView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mTextView = (TextView) findViewById(R.id.text_view);
SpannableString spannableString = new SpannableString("实例锦集");
spannableString.setSpan(new BulletSpan(50,Color.RED),0,1,Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
mTextView.setText(spannableString);
}
}
71.使用StrikethroughSpan添加文字删除线
public class MainActivity extends AppCompatActivity {
private TextView mTextView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mTextView = (TextView) findViewById(R.id.text_view);
SpannableString spannableString = new SpannableString("云计算是分布式计算的一种，指的是通过网络“云”将巨大的数据计算处理程序分解成无数个小程序。");
spannableString.setSpan(new StrikethroughSpan(),26,29,Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
mTextView.setText(spannableString);
}
}
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/linear_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:gravity="center">
<TextView
android:id="@+id/text_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="30sp"/>
</LinearLayout>
72.使用URLSpan为部分内容添加超链接
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
android:textSize="30sp"/>
</android.support.constraint.ConstraintLayout>
public class MainActivity extends AppCompatActivity {
private TextView mTextView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mTextView = (TextView) findViewById(R.id.textView);
SpannableString spannableString = new SpannableString("随便找一个,电话，百度,地址");
int startPos = spannableString.toString().indexOf("电话");
int endPos = startPos + 2;
spannableString.setSpan(new URLSpan("tel:12345678901"),startPos,endPos,Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
startPos = spannableString.toString().indexOf("百度");
endPos = startPos + 2;
spannableString.setSpan(new URLSpan("https://www.baidu.com"),startPos,endPos,Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
startPos = spannableString.toString().indexOf("地址");
endPos = startPos + 2;
spannableString.setSpan(new URLSpan("geo:38.899533,-77.036476"),startPos,endPos,Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
mTextView.setText(spannableString);
mTextView.setMovementMethod(LinkMovementMethod.getInstance());
}
}
参考链接：
TextView中添加超链接
https://www.jianshu.com/p/29a379512a13
73.使用ImageSpan同时显示QQ表情和文字
qq.png
public class MainActivity extends AppCompatActivity {
private TextView mTextView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mTextView = (TextView) findViewById(R.id.text_view);
SpannableString spannableString = new SpannableString("大爷，伤不起啊！我伤不起啊！伤不起啊！");
int startPos = spannableString.toString().indexOf("我伤不起啊！");
int endPos = startPos + "我伤不起啊！".toString().length();
Drawable drawable = ResourcesCompat.getDrawable(getResources(), R.drawable.qq, null);
drawable.setBounds(0,0,drawable.getIntrinsicWidth(),drawable.getIntrinsicHeight());
spannableString.setSpan(new ImageSpan(drawable),startPos,endPos,Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
mTextView.setText(spannableString);
}
}
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/linear_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:gravity="center">
<TextView
android:id="@+id/text_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="30sp"/>
</LinearLayout>
74.使用StyleSpan实现以粗斜体显示文字
public class MainActivity extends AppCompatActivity {
private TextView mTextView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mTextView = (TextView) findViewById(R.id.text_view);
SpannableString spannableString = new SpannableString("云计算是分布式计算的一种，指的是通过网络“云”将巨大的数据计算处理程序分解成无数个小程序。");
spannableString.setSpan(new StyleSpan(Typeface.BOLD_ITALIC),26,29,Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
mTextView.setText(spannableString);
}
}
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/linear_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:gravity="center">
<TextView
android:id="@+id/text_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="30sp"/>
</LinearLayout>
75.使用SuperscriptSpan绘制勾股定理公式
public class MainActivity extends AppCompatActivity {
private TextView mTextView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mTextView = (TextView) findViewById(R.id.text_view);
SpannableString spannableString = new SpannableString("勾股定理公式:a2+b2=c2");
spannableString.setSpan(new SuperscriptSpan(),8,9,Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
spannableString.setSpan(new SuperscriptSpan(),11,12,Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
spannableString.setSpan(new SuperscriptSpan(),14,15,Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
spannableString.setSpan(new RelativeSizeSpan(0.5f),8,9,Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
spannableString.setSpan(new RelativeSizeSpan(0.5f),11,12,Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
spannableString.setSpan(new RelativeSizeSpan(0.5f),14,15,Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
mTextView.setText(spannableString);
}
}
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/linear_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:gravity="center">
<TextView
android:id="@+id/text_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="30sp"/>
</LinearLayout>
76.使用SubscriptSpan绘制硫酸亚铁分子式
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/linear_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:gravity="center">
<TextView
android:id="@+id/text_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="20sp"/>
</LinearLayout>
public class MainActivity extends AppCompatActivity {
private TextView mTextView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mTextView = (TextView) findViewById(R.id.text_view);
SpannableString spannableString = new SpannableString("硫酸亚铁的分子式:FeSO4");
int fesPos = spannableString.toString().indexOf("4");
spannableString.setSpan(new SubscriptSpan(),fesPos,fesPos+1,Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
spannableString.setSpan(new RelativeSizeSpan(0.8f),fesPos,fesPos+1,Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
mTextView.setText(spannableString);
}
}
77.使用TypefaceSpan定制文本的部分内容
首先，下载字体。
https://github.com/microsoft/cascadia-code/releases
image.png
放到assets目录下。
public class MainActivity extends AppCompatActivity {
private TextView mTextView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mTextView = (TextView) findViewById(R.id.text_view);
mTextView.setText("abab");
Typeface typeface = Typeface.createFromAsset(getAssets(),"Cascadia.ttf");
mTextView.setTypeface(typeface);
SpannableString spannableString = new SpannableString(mTextView.getText());
spannableString.setSpan(new TypefaceSpan("Cascadia"),2,mTextView.getText().length(),Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
mTextView.setText(spannableString);
}
}
xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/linear_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:gravity="center">
<TextView
android:id="@+id/text_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="30sp"/>
</LinearLayout>
78.使用ForegroundColorSpan创建光照文字
首先，manifest中加入，下面的代码，否则字会不显示。
android:hardwareAccelerated="false"
image.png
public class MainActivity extends AppCompatActivity {
private TextView mTextView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mTextView = (TextView) findViewById(R.id.text_view);
mTextView.setText("google谷歌");
SpannableString spannableString = new SpannableString(mTextView.getText());
//应用红色前景
spannableString.setSpan(new ForegroundColorSpan(Color.RED),0,6,Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
spannableString.setSpan(new MaskFilterSpan(new EmbossMaskFilter(
new float[]{1,1,1},0.25f,6,3.5f
)),0,6,Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);//应用光照特效
mTextView.setText(spannableString);
}
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/linear_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:gravity="center">
<TextView
android:id="@+id/text_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="30sp"/>
</LinearLayout>
最后运行结果依然是魅族机型不显示，小米可以显示。这种特效太受限于机型了，实用性不强。
79.使用BlurMaskFilter创建阴影扩散文字
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
setContentView(new MyView(this));
super.onCreate(savedInstanceState);
}
class MyView extends View{
private Paint mPaint;
public MyView(Context context) {
super(context);
mPaint = new Paint();
mPaint.setFlags(Paint.ANTI_ALIAS_FLAG);
mPaint.setColor(Color.BLACK);
mPaint.setTextSize(200);
mPaint.setStyle(Paint.Style.FILL_AND_STROKE);
mPaint.setStrokeWidth(2);
BlurMaskFilter blurMaskFilter = new BlurMaskFilter(40,BlurMaskFilter.Blur.SOLID);
mPaint.setMaskFilter(blurMaskFilter);
}
@Override
protected void onDraw(Canvas canvas){
super.onDraw(canvas);
DisplayMetrics dm = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(dm);
int width = dm.widthPixels;
int height = dm.heightPixels;
canvas.drawText("炫酷应用",width/10,height/2-150,mPaint);
}
}
}
80.使用EmbossMaskFilter创建浮雕文字
首先，manifest中加入，下面的代码，否则字会不显示。
android:hardwareAccelerated="false"
public class MainActivity extends AppCompatActivity {
private TextView mTextView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mTextView = (TextView) findViewById(R.id.text_view);
SpannableStringBuilder spannableStringBuilder = new SpannableStringBuilder("炫酷");
float[] direction = new float[]{10,10,10};//设置光源方向
float light = 0.1f;//环境光亮度
float specular = 5;//反射等级
float blur = 5;//模糊半径
EmbossMaskFilter embossMaskFilter = new EmbossMaskFilter(direction,light,specular,blur);
MaskFilterSpan maskFilterSpan = new MaskFilterSpan(embossMaskFilter);
spannableStringBuilder.setSpan(maskFilterSpan,0,2,Spanned.SPAN_INCLUSIVE_INCLUSIVE);
mTextView.setText(spannableStringBuilder);
}
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/linear_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:gravity="center">
<TextView
android:id="@+id/text_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="30sp"/>
</LinearLayout>
81.通过自定义View在半圆弧上绘制文字
public class CustomTextView extends View{
private String mTextString = "android 炫酷实例集锦";
private Paint mPaint;
private Path mPath;
public CustomTextView(Context context, @Nullable AttributeSet attrs) {
super(context, attrs);
init();
}
@Override
protected void onDraw(Canvas canvas){
super.onDraw(canvas);
canvas.translate(100,490);
canvas.drawTextOnPath(mTextString,mPath,3,-10,mPaint);
}
public void init(){
mPaint = new Paint();
mPaint.setAntiAlias(true);
mPaint.setTextSize(96);
LinearGradient linearGradient = new LinearGradient(100,100,800,800,
Color.GREEN,Color.BLUE, Shader.TileMode.MIRROR);
mPaint.setShader(linearGradient);
if (mPath == null){
mPath = new Path();
mPath.addArc(100,100,800,800,180,180);
}
}
}
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<com.cc.uisample.CustomTextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
android:textSize="30sp"/>
</android.support.constraint.ConstraintLayout>
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
}
82.通过自定义View在圆弧上滚动文字
public class CustomTextView extends View{
private String mTextString = "人生得意须尽欢";
private Paint mPaint;
private Path mPath;
private Timer mTimer;
private TimerTask mTimerTask;
private float mPosX = 0;
public CustomTextView(Context context, @Nullable AttributeSet attrs) {
super(context, attrs);
init();
}
@Override
protected void onDraw(Canvas canvas){
super.onDraw(canvas);
canvas.translate(150,300);
canvas.drawTextOnPath(mTextString,mPath,mPosX,-10,mPaint);
}
public void init(){
mPaint = new Paint();
mPaint.setAntiAlias(true);
mPaint.setTextSize(80);
if (mPath == null){
mPath = new Path();
mPath.addArc(10,10,700,700,0,360);
}
}
public void starTask(){
if (mTimerTask != null){
mTimerTask.cancel();
}
mTimer = new Timer();
mTimerTask = new CustomTimerTask();
mTimer.schedule(mTimerTask,0,100);
}
public void stopTask(){
mTimerTask.cancel();
}
private class CustomTimerTask extends TimerTask{
@Override
public void run() {
mPosX += 10;
if (mPosX == 1500){
mPosX = 0;
}
postInvalidate();
}
}
}
public class MainActivity extends AppCompatActivity {
private CustomTextView mCustomTextView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mCustomTextView = (CustomTextView) findViewById(R.id.textView);
}
public void start(View view){
mCustomTextView.starTask();
}
public void stop(View view){
mCustomTextView.stopTask();
}
}
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent">
<com.cc.uisample.CustomTextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="85dp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
android:textSize="30sp"
/>
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="开始"
android:layout_marginLeft="8dp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toLeftOf="@+id/button2"
android:layout_marginRight="8dp"
android:onClick="start"/>
<Button
android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="停止"
android:layout_marginRight="55dp"
app:layout_constraintRight_toRightOf="parent"
android:onClick="stop"/>
</android.support.constraint.ConstraintLayout>
83.通过自定义View绘制渐变色的文字
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
setContentView(new MyView(this));
super.onCreate(savedInstanceState);
}
class MyView extends View{
private Paint mPaint;
public MyView(Context context) {
super(context);
}
@Override
protected void onDraw(Canvas canvas){
super.onDraw(canvas);
DisplayMetrics dm = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(dm);
int width = dm.widthPixels;
int height = dm.heightPixels;
Shader shader = new LinearGradient(0,0,160,160,
new int[]{Color.RED,Color.GREEN,Color.BLUE,Color.YELLOW},null, Shader.TileMode.REPEAT);
mPaint = new Paint();
mPaint.setShader(shader);
mPaint.setTextSize(160);
canvas.drawColor(Color.WHITE);
canvas.drawText("炫酷应用",50,height/2-200,mPaint);
}
}
}
84.通过自定义View绘制线条描边文字
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
setContentView(new MyView(this));
super.onCreate(savedInstanceState);
}
class MyView extends View{
private Paint mPaint;
public MyView(Context context) {
super(context);
mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
mPaint.setColor(Color.BLUE);
mPaint.setStyle(Paint.Style.STROKE);
mPaint.setTextSize(220);
mPaint.setStrokeWidth(1);
}
@Override
protected void onDraw(Canvas canvas){
super.onDraw(canvas);
DisplayMetrics dm = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(dm);
int width = dm.widthPixels;
int height = dm.heightPixels;
canvas.scale(1.0f,1.5f);
canvas.drawText("炫酷应用",width/10,height * 3/10,mPaint);
}
}
}
85.通过自定义View绘制阴影扩散文字
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
setContentView(new MyView(this));
super.onCreate(savedInstanceState);
}
class MyView extends View{
private Paint mPaint;
public MyView(Context context) {
super(context);
mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
mPaint.setAntiAlias(true);
mPaint.setColor(Color.BLUE);
mPaint.setStyle(Paint.Style.FILL_AND_STROKE);
mPaint.setTextSize(200);
mPaint.setStrokeWidth(2);
mPaint.setShadowLayer(15f,10f,10f,Color.GRAY);
}
@Override
protected void onDraw(Canvas canvas){
super.onDraw(canvas);
DisplayMetrics dm = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(dm);
int width = dm.widthPixels;
int height = dm.heightPixels;
canvas.scale(1.0f,1.5f);
canvas.drawText("炫酷应用",width/10,height * 2/5,mPaint);
}
}
}
86.加载字库文件显示自定义草书字体
字体是要钱的，所以em。。还是用微软的吧。
下载地址77.使用TypefaceSpan定制文本的部分内容
有。
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/linear_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:gravity="center">
<TextView
android:id="@+id/text_view"
android:text="asdjhuigiyf"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="30sp"/>
</LinearLayout>
public class MainActivity extends AppCompatActivity {
private TextView mTextView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mTextView = (TextView) findViewById(R.id.text_view);
Typeface typeface = Typeface.createFromAsset(getAssets(),"Cascadia.ttf");
mTextView.setTypeface(typeface);
}
}
87.加载字库文件显示自定义液晶字体
字体是要钱的，所以依旧还是用微软的吧。
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/linear_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:gravity="center">
<TextView
android:id="@+id/text_view"
android:text="asdjhuigiyf"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="30sp"/>
</LinearLayout>
public class MainActivity extends AppCompatActivity {
private TextView mTextView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mTextView = (TextView) findViewById(R.id.text_view);
AssetManager assetManager = getAssets();
Typeface typeface = Typeface.createFromAsset(assetManager,"Cascadia.ttf");
mTextView.setTypeface(typeface);
}
}
88.判断在一个字符串中是否包含汉字
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="@+id/text_view"
android:text="测试内容："
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginLeft="8dp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toTopOf="parent"
android:layout_marginTop="16dp"
android:textSize="20sp"/>
<EditText
android:id="@+id/edit_text"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
app:layout_constraintLeft_toRightOf="@+id/text_view"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintTop_toTopOf="parent"
android:layout_marginTop="8dp"/>
<Button
android:id="@+id/button"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:text="Button"
android:layout_marginRight="8dp"
app:layout_constraintRight_toRightOf="parent"
android:layout_marginLeft="8dp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toTopOf="parent"
android:layout_marginTop="64dp"/>
</android.support.constraint.ConstraintLayout>
public class MainActivity extends AppCompatActivity {
private EditText mEditText;
private Button mButton;
private String format = "[\\u4E00-\\u9FA5\\uF900-\\uFA2D]";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mEditText = (EditText) findViewById(R.id.edit_text);
mButton = (Button) findViewById(R.id.button);
mButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
String string = mEditText.getText().toString();
Pattern pattern = Pattern.compile(format);
Matcher matcher = pattern.matcher(string);
boolean result = matcher.find();
if (result){
Toast.makeText(MainActivity.this,"有汉字",Toast.LENGTH_SHORT).show();
}else {
Toast.makeText(MainActivity.this,"无汉字",Toast.LENGTH_SHORT).show();
}
}
});
}
}
