Android 兑现截屏

Android实现截屏功能，使用View的方法，得到以时间戳命名的png图片

View view = v.getRootView();

view.setDrawingCacheEnabled(true);

view.buildDrawingCache();

Bitmap bitmap1 = view.getDrawingCache(); //取得全屏，包括状态栏，标题栏

//获取状态栏高度

Rect frame = new Rect();

AndroidSamplesActivity.this.getWindow().getDecorView().getWindowVisibleDisplayFrame(frame);

int statusBarHeight = frame.top;

int width = AndroidSamplesActivity.this.getWindowManager().getDefaultDisplay().getWidth();

int height = AndroidSamplesActivity.this.getWindowManager().getDefaultDisplay().getHeight();

//去除状态栏

Bitmap bitmap = Bitmap.createBitmap(bitmap1, 0, statusBarHeight, width, height - statusBarHeight);

try {

SimpleDateFormat dateFormat = new SimpleDateFormat("yyyyMMddHHmmss", Locale.US);

String fname = "/sdcard/" + dateFormat.format(new Date()) + ".png";//把获得的图片保存到sd卡下

FileOutputStream out = new FileOutputStream(fname);

bitmap.compress(Bitmap.CompressFormat.PNG, 100, out);

out.flush();

out.close();

Toast.makeText(AndroidSamplesActivity.this,"截屏成功！",Toast.LENGTH_SHORT).show();

} catch (FileNotFoundException e) {

e.printStackTrace();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

但FileOutputStream out = new FileOutputStream(fname);要正常运行的话，要在AndroidManifest.xml文件中加

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />，即打开文件写权限，外部存储权限。