Android 365存钱法 心形自定义View实现

因为数据比较多，是22*25的，所以手机上比较挤：

b4ecf83ebf62decad48ea827d4df56e.jpg

感觉最麻烦的就是数据，程序员的惰性思维告诉我可以使用for循环填充，但是愚笨的大脑没找到实现的方式，就一点点手打了：

image.png

没有办法，我就是这么强大（dog）

接下来就是自定义View的实现过程：

public class Heart365View extends View {

    private int[][] array   = null;
    private int     width   = 0;
    private int     height  = 30;
    private int     padding = 0;
    private Paint   boxPaint, textPaint, bitmapPaint, backPaint;
    private Bitmap        heartBitmap;
    private List<Integer> list = new ArrayList<>();

    public Heart365View(Context context) {
        this(context, null);
    }

    public Heart365View(Context context, @Nullable AttributeSet attrs) {
        this(context, attrs, 0);
    }

    public Heart365View(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init();
    }

    //初始化画笔 和 宽度 和数据库数据
    private void init() {
        array = HeartArray.getArrays();
        backPaint = new Paint();
        backPaint.setColor(Color.parseColor("#FFC0CB"));
        boxPaint = new Paint();
        boxPaint.setColor(Color.parseColor("#FA8072"));
        textPaint = new Paint();
        textPaint.setColor(Color.parseColor("#2595e4"));
        textPaint.setTextSize(15);
        bitmapPaint = new Paint();
        heartBitmap = Utils.drawable2Bitmap(getContext().getResources().getDrawable(R.mipmap.heart));
        list.addAll(SqlUtils.getInstance(getContext()).getAllData());
        initBoxWidth();
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        //循环渲染界面
        for (int i = 0; i < array.length; i++) {
            for (int j = 0; j < array[i].length; j++) {
                int num = array[i][j];
                //大于0的是正常天数
                if (num > 0) {
                    //这条数据是否需要渲染背景，也就是有没有存过
                    boolean exists = list.indexOf(num) != -1;
                    //如果数据存在，就画背景
                    if (exists)
                        canvas.drawRect(j * width + padding, i * height, (j + 1) * width + padding, (i + 1) * height, backPaint);
                    //上方横线
                    canvas.drawLine(j * width + padding, i * height, (j + 1) * width + padding, i * height, boxPaint);
                    //左竖
                    canvas.drawLine(j * width + padding, i * height, j * width + padding, (i + 1) * height, boxPaint);
                    //下方横线
                    canvas.drawLine((j + 1) * width + padding, i * height, (j + 1) * width + padding, (i + 1) * height, boxPaint);
                    //右竖
                    canvas.drawLine(j * width + padding, (i + 1) * height, (j + 1) * width + padding, (i + 1) * height, boxPaint);
                    //画文字
                    canvas.drawText(num + "", (j * width) + getPaddingLR(num + "") + padding, ((i + 1) * height) - 10, textPaint);
                } else if (num < 0) {
                    //画心
                    canvas.drawBitmap(heartBitmap, (j * width) + padding, (i) * height + 1, bitmapPaint);
                }
            }
        }
    }

    //新增天数 刷新界面
    public void update(int i) {
        list.add(i);
        invalidate();
    }


    //初始化每一格的宽度
    void initBoxWidth() {
        int windowWidth = Utils.getWindowWidth(getContext());
        width = (windowWidth) / (array[0].length);
        padding = (windowWidth - (width * array[0].length)) / 2;
        Log.e("yxs", "获取屏幕宽度：" + windowWidth + "---" + width + "---" + array[0].length + "----" + padding);
    }

    //使数组居中，计算Padding
    int getPaddingLR(String s) {
        switch (s.length()) {
            case 1:
                return 12;
            case 2:
                return 6;
            case 3:
                return 2;
        }
        return 0;
    }

}

数据库操作：

public class SqlUtils extends SQLiteOpenHelper {
    private        SQLiteDatabase database;
    private        Cursor         cursor;
    private static SqlUtils       utils;

    public static SqlUtils getInstance(Context c) {
        if (utils == null)
            utils = new SqlUtils(c);
        return utils;
    }

    public SqlUtils(@Nullable Context context) {
        super(context, "heart.db", null, 1);
    }

    @Override
    public void onCreate(SQLiteDatabase db) {
        db.execSQL("create table if not exists h(_id integer primary key autoincrement , num integer)");
    }

    public boolean add(int i) {
        if (isExists(i)) {
            Utils.showToast("数据已存在～");
            return false;
        } else {
            database = getDatabase();
            database.execSQL("insert into h (num) values(?)", new String[]{i + ""});
            return true;
        }
    }

    public boolean isExists(int i) {
        database = getDatabase();
        cursor = database.rawQuery("select * from h where num=?", new String[]{i + ""});
        return cursor.moveToFirst();
    }

    public List<Integer> getAllData() {
        database = getDatabase();
        cursor = database.rawQuery("select * from h", new String[]{});
        List<Integer> list = new ArrayList<>();
        while (cursor.moveToNext()) {
            int i = cursor.getInt(cursor.getColumnIndex("num"));
            Log.e("yxs", "读取数据：" + i);
            list.add(i);
        }
        return list;
    }

    public SQLiteDatabase getDatabase() {
        if (database == null)
            database = getWritableDatabase();
        return database;
    }

    public void close() {
        if (cursor != null)
            cursor.close();
        if (database != null)
            database.close();
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {

    }
}

使用方法，xml直接调用自定义View，Activity：

public class MainActivity extends AppCompatActivity {

    private Heart365View heartView;
    private SqlUtils     sqlUtils;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        heartView = findViewById(R.id.Heart);
        final EditText ed = findViewById(R.id.Ed);
        sqlUtils = SqlUtils.getInstance(this);
        findViewById(R.id.add).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                int i = Integer.parseInt(ed.getText().toString());
                if (sqlUtils.add(i)) {
                    heartView.update(i);
                }
            }
        });

    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        sqlUtils.close();
    }
}

点个赞哦亲，我太难了