Android设置重复文字水印背景

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效果如图：

这里写图片描述

自定义Drawable ：

/** * Created by Owen Chan * On 2017-07-05. */public class WaterMarkBg extends Drawable {    private Paint paint = new Paint();    private String logo = "SoYoung";    public WaterMarkBg(String logo) {        this.logo = logo;    }    @Override    public void draw(@NonNull Canvas canvas) {        int width = getBounds().right;        int height = getBounds().bottom;        canvas.drawColor(Color.parseColor("#F3F5F9"));        paint.setColor(Color.parseColor("#AEAEAE"));        paint.setAntiAlias(true);        paint.setTextSize(30);        canvas.save();        canvas.rotate(-30);        float textWidth = paint.measureText(logo);        int index = 0;        for (int positionY = height / 10; positionY <= height; positionY += height / 10) {            float fromX = -width + (index++ % 2) * textWidth;            for (float positionX = fromX; positionX < width; positionX += textWidth * 2) {                canvas.drawText(logo, positionX, positionY, paint);            }        }        canvas.restore();    }    @Override    public void setAlpha(@IntRange(from = 0, to = 255) int alpha) {    }    @Override    public void setColorFilter(@Nullable ColorFilter colorFilter) {    }    @Override    public int getOpacity() {        return PixelFormat.UNKNOWN;    }}

代码中的设置：

public class MainActivity extends AppCompatActivity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        findViewById(R.id.text).setBackground(new WaterMarkBg("Owen Chan"));    }}

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