android截屏

截屏是一个常用的操作，经常会有这种需求。

截屏的工具类

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package com.fxb.screenshot;   import android.app.Activity; import android.graphics.Bitmap; import android.graphics.Bitmap.CompressFormat; import android.graphics.Matrix; import android.graphics.Rect; import android.util.DisplayMetrics; import android.view.View;   import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException;   public class ScreenShot {       private static Bitmap getScreenBitmap(Activity activity){         View root = activity.getWindow().getDecorView();         root.setDrawingCacheEnabled(true);         root.buildDrawingCache();         Bitmap bitmapOri = root.getDrawingCache();           Rect rect = new Rect();         activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(rect);         int statusBarHeight = rect.top;   //        int width = activity.getWindowManager().getDefaultDisplay().getWidth(); //        int height = activity.getWindowManager().getDefaultDisplay().getHeight();           DisplayMetrics metric = new DisplayMetrics();         activity.getWindowManager().getDefaultDisplay().getMetrics(metric);           Matrix matrix = new Matrix();         matrix.setScale(0.5f, 0.5f);         Bitmap bitmapSamll = bitmapOri.createBitmap(bitmapOri,                                                     0, statusBarHeight, metric.widthPixels, metric.heightPixels - statusBarHeight,                                                     matrix, true);         root.destroyDrawingCache();         return bitmapSamll;     }       private static void saveBitmap(Bitmap bitmap, String path){         try {             FileOutputStream fos = new FileOutputStream(path);             if(fos != null){                 bitmap.compress(CompressFormat.PNG, 90, fos);                 fos.flush();                 fos.close();             }         } catch (FileNotFoundException e) {             e.printStackTrace();         } catch (IOException e) {             e.printStackTrace();         }     }       public static void shoot(Activity activity, String path){         Bitmap bitmap = getScreenBitmap(activity);         saveBitmap(bitmap, path);     }   }

测试类

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package com.fxb.screenshot;   import android.app.Activity; import android.os.Bundle; import android.os.Environment; import android.util.Log; import android.view.View; import android.widget.Button; import android.widget.TextView;   import java.io.File;   public class MainActivity extends Activity implements View.OnClickListener {       public static final String TAG = "ScreenShot";       private TextView tvShow;     private Button btnShot;       @Override     protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.activity_main);         initView();     }       private void initView(){         tvShow = (TextView)findViewById(R.id.tvShow);         btnShot = (Button)findViewById(R.id.btnShot);           btnShot.setOnClickListener(this);     }       @Override     public void onClick(View v) {         if(v == btnShot){             String rootPath = Environment.getExternalStorageDirectory() + "/pictest";             File file = new File(rootPath);             if(!file.exists()){                 file.mkdir();             } //            String path = Environment.getExternalStorageDirectory() + "/pictest/shot_" + System.currentTimeMillis() + ".png";             String path = rootPath + "/shot_" + System.currentTimeMillis() + ".png";             ScreenShot.shoot(this, path);             Log.i(TAG, "shot over!");         }     } }

截屏保存在外置sd卡，需添加写外置存储的权限。