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
