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      1 /*
      2  * Copyright (C) 2011 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.test.hwui;
     18 
     19 import android.app.Activity;
     20 import android.graphics.Bitmap;
     21 import android.graphics.SurfaceTexture;
     22 import android.hardware.Camera;
     23 import android.os.Bundle;
     24 import android.os.Environment;
     25 import android.view.Gravity;
     26 import android.view.TextureView;
     27 import android.view.View;
     28 import android.widget.Button;
     29 import android.widget.FrameLayout;
     30 
     31 import java.io.FileNotFoundException;
     32 import java.io.FileOutputStream;
     33 import java.io.IOException;
     34 
     35 @SuppressWarnings({"UnusedDeclaration"})
     36 public class GetBitmapActivity extends Activity implements TextureView.SurfaceTextureListener {
     37     private Camera mCamera;
     38     private TextureView mTextureView;
     39 
     40     @Override
     41     protected void onCreate(Bundle savedInstanceState) {
     42         super.onCreate(savedInstanceState);
     43 
     44         FrameLayout content = new FrameLayout(this);
     45 
     46         mTextureView = new TextureView(this);
     47         mTextureView.setSurfaceTextureListener(this);
     48 
     49         Button button = new Button(this);
     50         button.setText("Copy bitmap to /sdcard/textureview.png");
     51         button.setOnClickListener(new View.OnClickListener() {
     52             @Override
     53             public void onClick(View v) {
     54                 Bitmap b = mTextureView.getBitmap();
     55                 try {
     56                     FileOutputStream out = new FileOutputStream(
     57                             Environment.getExternalStorageDirectory() + "/textureview.png");
     58                     try {
     59                         b.compress(Bitmap.CompressFormat.PNG, 100, out);
     60                     } finally {
     61                         try {
     62                             out.close();
     63                         } catch (IOException e) {
     64                             // Ignore
     65                         }
     66                     }
     67                 } catch (FileNotFoundException e) {
     68                     // Ignore
     69                 }
     70             }
     71         });
     72 
     73         content.addView(mTextureView, new FrameLayout.LayoutParams(500, 400, Gravity.CENTER));
     74         content.addView(button, new FrameLayout.LayoutParams(
     75                 FrameLayout.LayoutParams.WRAP_CONTENT, FrameLayout.LayoutParams.WRAP_CONTENT,
     76                 Gravity.CENTER_HORIZONTAL | Gravity.BOTTOM));
     77         setContentView(content);
     78     }
     79 
     80     @Override
     81     public void onSurfaceTextureAvailable(SurfaceTexture surface, int width, int height) {
     82         mCamera = Camera.open();
     83 
     84         try {
     85             mCamera.setPreviewTexture(surface);
     86         } catch (IOException t) {
     87             android.util.Log.e("TextureView", "Cannot set preview texture target!", t);
     88         }
     89 
     90         mCamera.startPreview();
     91     }
     92 
     93     @Override
     94     public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width, int height) {
     95         // Ignored, the Camera does all the work for us
     96     }
     97 
     98     @Override
     99     public boolean onSurfaceTextureDestroyed(SurfaceTexture surface) {
    100         mCamera.stopPreview();
    101         mCamera.release();
    102         return true;
    103     }
    104 
    105     @Override
    106     public void onSurfaceTextureUpdated(SurfaceTexture surface) {
    107         // Ignored
    108     }
    109 }
    110