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      1 /*
      2  * Copyright (C) 2016 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.hardware.Camera;
     22 import android.os.Bundle;
     23 import android.os.Environment;
     24 import android.view.Gravity;
     25 import android.view.PixelCopy;
     26 import android.view.Surface;
     27 import android.view.SurfaceHolder;
     28 import android.view.SurfaceView;
     29 import android.view.View;
     30 import android.widget.Button;
     31 import android.widget.FrameLayout;
     32 import android.widget.Toast;
     33 
     34 import java.io.FileOutputStream;
     35 import java.io.IOException;
     36 
     37 public class GetBitmapSurfaceViewActivity extends Activity implements SurfaceHolder.Callback {
     38     private Camera mCamera;
     39     private SurfaceView mSurfaceView;
     40 
     41     @Override
     42     protected void onCreate(Bundle savedInstanceState) {
     43         super.onCreate(savedInstanceState);
     44 
     45         FrameLayout content = new FrameLayout(this);
     46 
     47         mSurfaceView = new SurfaceView(this);
     48         mSurfaceView.getHolder().addCallback(this);
     49 
     50         Button button = new Button(this);
     51         button.setText("Copy bitmap to /sdcard/surfaceview.png");
     52         button.setOnClickListener((View v) -> {
     53             final Bitmap b = Bitmap.createBitmap(
     54                     mSurfaceView.getWidth(), mSurfaceView.getHeight(),
     55                     Bitmap.Config.ARGB_8888);
     56             PixelCopy.request(mSurfaceView, b,
     57                     (int result) -> {
     58                         if (result != PixelCopy.SUCCESS) {
     59                             Toast.makeText(GetBitmapSurfaceViewActivity.this,
     60                                     "Failed to copy", Toast.LENGTH_SHORT).show();
     61                             return;
     62                         }
     63                         try {
     64                             try (FileOutputStream out = new FileOutputStream(
     65                                     Environment.getExternalStorageDirectory() + "/surfaceview.png");) {
     66                                 b.compress(Bitmap.CompressFormat.PNG, 100, out);
     67                             }
     68                         } catch (Exception e) {
     69                             // Ignore
     70                         }
     71                     }, mSurfaceView.getHandler());
     72         });
     73 
     74         content.addView(mSurfaceView, new FrameLayout.LayoutParams(500, 400, Gravity.CENTER));
     75         content.addView(button, new FrameLayout.LayoutParams(
     76                 FrameLayout.LayoutParams.WRAP_CONTENT, FrameLayout.LayoutParams.WRAP_CONTENT,
     77                 Gravity.CENTER_HORIZONTAL | Gravity.BOTTOM));
     78         setContentView(content);
     79     }
     80 
     81     @Override
     82     public void surfaceCreated(SurfaceHolder holder) {
     83         mCamera = Camera.open();
     84 
     85         try {
     86             mCamera.setPreviewSurface(holder.getSurface());
     87         } catch (IOException t) {
     88             android.util.Log.e("TextureView", "Cannot set preview texture target!", t);
     89         }
     90 
     91         setCameraDisplayOrientation(this, 0, mCamera);
     92         mCamera.startPreview();
     93     }
     94 
     95     public static void setCameraDisplayOrientation(Activity activity,
     96             int cameraId, android.hardware.Camera camera) {
     97         android.hardware.Camera.CameraInfo info = new android.hardware.Camera.CameraInfo();
     98         android.hardware.Camera.getCameraInfo(cameraId, info);
     99         int rotation = activity.getWindowManager().getDefaultDisplay()
    100                 .getRotation();
    101         int degrees = 0;
    102         switch (rotation) {
    103             case Surface.ROTATION_0:
    104                 degrees = 0;
    105                 break;
    106             case Surface.ROTATION_90:
    107                 degrees = 90;
    108                 break;
    109             case Surface.ROTATION_180:
    110                 degrees = 180;
    111                 break;
    112             case Surface.ROTATION_270:
    113                 degrees = 270;
    114                 break;
    115         }
    116 
    117         int result;
    118         if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
    119             result = (info.orientation + degrees) % 360;
    120             result = (360 - result) % 360; // compensate the mirror
    121         } else { // back-facing
    122             result = (info.orientation - degrees + 360) % 360;
    123         }
    124         camera.setDisplayOrientation(result);
    125     }
    126 
    127     @Override
    128     public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
    129     }
    130 
    131     @Override
    132     public void surfaceDestroyed(SurfaceHolder holder) {
    133         mCamera.stopPreview();
    134         mCamera.release();
    135     }
    136 }
    137