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
onCreate(Bundle savedInstanceState)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
surfaceCreated(SurfaceHolder holder)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 
setCameraDisplayOrientation(Activity activity, int cameraId, android.hardware.Camera camera)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
surfaceChanged(SurfaceHolder holder, int format, int width, int height)128     public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
129     }
130 
131     @Override
surfaceDestroyed(SurfaceHolder holder)132     public void surfaceDestroyed(SurfaceHolder holder) {
133         mCamera.stopPreview();
134         mCamera.release();
135     }
136 }
137