Android View转换成图片保存

import java.io.File;    import java.io.FileOutputStream;        import android.os.Bundle;    import android.os.Environment;    import android.os.Handler;    import android.view.View;    import android.widget.Button;    import android.widget.TextView;    import android.app.Activity;    import android.graphics.Bitmap;    import android.graphics.Canvas;    import android.graphics.Color;    import android.graphics.Paint;        /**    * 把Android的一个View转换成图片保存    *     * */        public class MainActivity extends Activity {            @Override        protected void onCreate(Bundle savedInstanceState) {            super.onCreate(savedInstanceState);            setContentView(R.layout.activity_main);                final TextView tv = (TextView) findViewById(R.id.textView);            tv.setBackgroundColor(Color.GREEN);            // tv.setDrawingCacheEnabled(true);                final Runnable runnable = new Runnable() {                @Override                public void run() {                    viewSaveToImage(tv);                }            };                Button button = (Button) findViewById(R.id.button);            button.setOnClickListener(new View.OnClickListener() {                    @Override                public void onClick(View v) {                    new Handler().post(runnable);                }            });            }            public void viewSaveToImage(View view) {            view.setDrawingCacheEnabled(true);            view.setDrawingCacheQuality(View.DRAWING_CACHE_QUALITY_HIGH);            view.setDrawingCacheBackgroundColor(Color.WHITE);                // 把一个View转换成图片            Bitmap cachebmp = loadBitmapFromView(view);                // 添加水印            Bitmap bitmap = Bitmap.createBitmap(createWatermarkBitmap(cachebmp,                    "@ Zhang Phil"));                FileOutputStream fos;            try {                // 判断手机设备是否有SD卡                boolean isHasSDCard = Environment.getExternalStorageState().equals(                        android.os.Environment.MEDIA_MOUNTED);                if (isHasSDCard) {                    // SD卡根目录                    File sdRoot = Environment.getExternalStorageDirectory();                    File file = new File(sdRoot, "test.PNG");                    fos = new FileOutputStream(file);                } else                    throw new Exception("创建文件失败!");                    bitmap.compress(Bitmap.CompressFormat.PNG, 90, fos);                    fos.flush();                fos.close();                } catch (Exception e) {                e.printStackTrace();            }                view.destroyDrawingCache();        }            private Bitmap loadBitmapFromView(View v) {            int w = v.getWidth();            int h = v.getHeight();                Bitmap bmp = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);            Canvas c = new Canvas(bmp);                c.drawColor(Color.WHITE);            /** 如果不设置canvas画布为白色，则生成透明 */                v.layout(0, 0, w, h);            v.draw(c);                return bmp;        }            // 为图片target添加水印        private Bitmap createWatermarkBitmap(Bitmap target, String str) {            int w = target.getWidth();            int h = target.getHeight();                Bitmap bmp = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);            Canvas canvas = new Canvas(bmp);                Paint p = new Paint();                // 水印的颜色            p.setColor(Color.RED);                // 水印的字体大小            p.setTextSize(16);                p.setAntiAlias(true);// 去锯齿                canvas.drawBitmap(target, 0, 0, p);                // 在中间位置开始添加水印            canvas.drawText(str, w / 2, h / 2, p);                canvas.save(Canvas.ALL_SAVE_FLAG);            canvas.restore();                return bmp;        }    }
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Android View转换成图片保存
