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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.Matrix;
     21 import android.graphics.SurfaceTexture;
     22 import android.hardware.Camera;
     23 import android.os.Bundle;
     24 import android.view.Gravity;
     25 import android.view.TextureView;
     26 import android.view.View;
     27 import android.widget.Button;
     28 import android.widget.FrameLayout;
     29 
     30 import java.io.IOException;
     31 
     32 @SuppressWarnings({"UnusedDeclaration"})
     33 public class TextureViewActivity extends Activity implements TextureView.SurfaceTextureListener {
     34     private Camera mCamera;
     35     private TextureView mTextureView;
     36     private FrameLayout mContent;
     37     private Matrix mMatrix = new Matrix();
     38 
     39     @Override
     40     protected void onCreate(Bundle savedInstanceState) {
     41         super.onCreate(savedInstanceState);
     42 
     43         mContent = new FrameLayout(this);
     44 
     45         mTextureView = new TextureView(this);
     46         mTextureView.setSurfaceTextureListener(this);
     47 
     48         Button button = new Button(this);
     49         button.setText("Remove/Add");
     50         button.setOnClickListener(new View.OnClickListener() {
     51             private boolean mAdded = true;
     52 
     53             @Override
     54             public void onClick(View v) {
     55                 if (mAdded) {
     56                     mContent.removeView(mTextureView);
     57                 } else {
     58                     mContent.addView(mTextureView);
     59                 }
     60                 mAdded = !mAdded;
     61             }
     62         });
     63 
     64         mContent.addView(mTextureView, new FrameLayout.LayoutParams(
     65                 FrameLayout.LayoutParams.WRAP_CONTENT, FrameLayout.LayoutParams.WRAP_CONTENT,
     66                 Gravity.CENTER));
     67         mContent.addView(button, new FrameLayout.LayoutParams(
     68                 FrameLayout.LayoutParams.WRAP_CONTENT, FrameLayout.LayoutParams.WRAP_CONTENT,
     69                 Gravity.CENTER_HORIZONTAL | Gravity.BOTTOM));
     70         setContentView(mContent);
     71     }
     72 
     73     @Override
     74     public void onSurfaceTextureAvailable(SurfaceTexture surface, int width, int height) {
     75         mCamera = Camera.open();
     76         Camera.Size previewSize = mCamera.getParameters().getPreviewSize();
     77         mTextureView.setLayoutParams(new FrameLayout.LayoutParams(
     78                 previewSize.width, previewSize.height, Gravity.CENTER));
     79 
     80         try {
     81             mCamera.setPreviewTexture(surface);
     82         } catch (IOException t) {
     83             android.util.Log.e("TextureView", "Cannot set preview texture target!", t);
     84         }
     85 
     86         mCamera.startPreview();
     87     }
     88 
     89     @Override
     90     public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width, int height) {
     91         // Ignored, the Camera does all the work for us
     92     }
     93 
     94     @Override
     95     public boolean onSurfaceTextureDestroyed(SurfaceTexture surface) {
     96         mCamera.stopPreview();
     97         mCamera.release();
     98         return true;
     99     }
    100 
    101     @Override
    102     public void onSurfaceTextureUpdated(SurfaceTexture surface) {
    103         // Ignored
    104     }
    105 }
    106