android图片添加文字,android图片上添加文字

1. 效果图

原图：

2.主要代码

public class MainActivity extends Activity {

ImageView img;

private Bitmap imgMarker;

private int width,height; //图片的高度和宽带

private Bitmap imgTemp; //临时标记图

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

img = (ImageView) findViewById(R.id.imt_test);

imgMarker = BitmapFactory.decodeResource(getResources(), R.drawable.icon_tag);

width = imgMarker.getWidth();

height = imgMarker.getHeight();

img.setBackgroundDrawable(createDrawable('A'));

}

// 穿件带字母的标记图片

private Drawable createDrawable(char letter) {

imgTemp = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);

Canvas canvas = new Canvas(imgTemp);

Paint paint = new Paint(); // 建立画笔

paint.setDither(true);

paint.setFilterBitmap(true);

Rect src = new Rect(0, 0, width, height);

Rect dst = new Rect(0, 0, width, height);

canvas.drawBitmap(imgMarker, src, dst, paint);

Paint textPaint = new Paint(Paint.ANTI_ALIAS_FLAG

| Paint.DEV_KERN_TEXT_FLAG);

textPaint.setTextSize(20.0f);

textPaint.setTypeface(Typeface.DEFAULT_BOLD); // 采用默认的宽度

textPaint.setColor(Color.WHITE);

canvas.drawText(String.valueOf(letter), width /2-5, height/2+5,

textPaint);

canvas.save(Canvas.ALL_SAVE_FLAG);

canvas.restore();

return (Drawable) new BitmapDrawable(getResources(), imgTemp);

}

@Override

public boolean onCreateOptionsMenu(Menu menu) {

// Inflate the menu; this adds items to the action bar if it is present.

getMenuInflater().inflate(R.menu.activity_main, menu);

return true;

}

}

测试通过，可以使用

源码下载地址： 点击打开链接