2018-11-14 Android 自定义TextView完成
自定义TextView
public class MyProgressextends AppCompatTextView {
Paintpaint =new Paint();
int x ;
Rectrect;
public MyProgress(Context context) {
super(context);
initView();
}
public MyProgress(Context context, @Nullable AttributeSet attrs) {
super(context, attrs);
initView();
}
public MyProgress(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
initView();
}
public void initView(){
rect =new Rect();
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
paint.setColor(Color.GRAY);
paint.setStyle(Paint.Style.FILL);
rect.set(0,0,getMeasuredWidth(),getMeasuredHeight());
canvas.drawRect(rect,paint);
paint.setColor(Color.RED);
if(x !=100){
canvas.drawRect(0,0,getMeasuredWidth()*x/100, getMeasuredHeight(),paint);
}else{
paint.setColor(Color.GREEN);
canvas.drawRect(0,0,getMeasuredWidth()*x/100, getMeasuredHeight(),paint);
}
paint.setColor(Color.WHITE);
paint.setTextSize(15);
Paint.FontMetricsInt fontMetrics =paint.getFontMetricsInt();
int baseline = (rect.bottom +rect.top - fontMetrics.bottom - fontMetrics.top) /2;
paint.setTextAlign(Paint.Align.CENTER);
canvas.drawText(x +"%",rect.centerX(),baseline,paint);
}
public void setProgress(int x){
this.x = x;
invalidate();
}
}
调用的话，自己写个SeekBar测试即可：
MyProgress myProgress = (MyProgress) findViewById(R.id.text);
seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
@Override
public void onProgressChanged(SeekBar seekBar, int i, boolean b) {
myProgress.setProgress(i);
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
}
});
布局文件
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
android:id="@+id/seek_bar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"/>
android:id="@+id/text"
android:layout_width="200dp"
android:layout_height="40dp"
android:layout_marginTop="60dp"
android:gravity="center"
android:textColor="@android:color/holo_red_light"
android:layout_gravity="center"/>
</LinearLayout>
截图如下：
