1 /* 2 * Copyright (C) 2014 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.example.android.apis.media.projection; 18 19 import com.example.android.apis.R; 20 21 import android.app.Activity; 22 import android.content.Context; 23 import android.content.Intent; 24 import android.content.res.Configuration; 25 import android.hardware.display.DisplayManager; 26 import android.hardware.display.VirtualDisplay; 27 import android.media.projection.MediaProjection; 28 import android.media.projection.MediaProjectionManager; 29 import android.os.Bundle; 30 import android.util.DisplayMetrics; 31 import android.util.Log; 32 import android.view.Surface; 33 import android.view.SurfaceHolder; 34 import android.view.SurfaceView; 35 import android.view.View; 36 import android.view.ViewGroup; 37 import android.widget.AdapterView; 38 import android.widget.ArrayAdapter; 39 import android.widget.Spinner; 40 import android.widget.Toast; 41 import android.widget.ToggleButton; 42 43 import java.util.ArrayList; 44 import java.util.List; 45 46 public class MediaProjectionDemo extends Activity { 47 private static final String TAG = "MediaProjectionDemo"; 48 private static final int PERMISSION_CODE = 1; 49 private static final List<Resolution> RESOLUTIONS = new ArrayList<Resolution>() {{ 50 add(new Resolution(640,360)); 51 add(new Resolution(960,540)); 52 add(new Resolution(1366,768)); 53 add(new Resolution(1600,900)); 54 }}; 55 56 private int mScreenDensity; 57 private MediaProjectionManager mProjectionManager; 58 59 private int mDisplayWidth; 60 private int mDisplayHeight; 61 private boolean mScreenSharing; 62 63 private MediaProjection mMediaProjection; 64 private VirtualDisplay mVirtualDisplay; 65 private Surface mSurface; 66 private SurfaceView mSurfaceView; 67 private ToggleButton mToggle; 68 69 @Override 70 public void onCreate(Bundle savedInstanceState) { 71 super.onCreate(savedInstanceState); 72 setContentView(R.layout.media_projection); 73 74 DisplayMetrics metrics = new DisplayMetrics(); 75 getWindowManager().getDefaultDisplay().getMetrics(metrics); 76 mScreenDensity = metrics.densityDpi; 77 78 mSurfaceView = (SurfaceView) findViewById(R.id.surface); 79 mSurface = mSurfaceView.getHolder().getSurface(); 80 mProjectionManager = 81 (MediaProjectionManager) getSystemService(Context.MEDIA_PROJECTION_SERVICE); 82 83 ArrayAdapter<Resolution> arrayAdapter = new ArrayAdapter<Resolution>( 84 this, android.R.layout.simple_list_item_1, RESOLUTIONS); 85 Spinner s = (Spinner) findViewById(R.id.spinner); 86 s.setAdapter(arrayAdapter); 87 s.setOnItemSelectedListener(new ResolutionSelector()); 88 s.setSelection(0); 89 90 mToggle = (ToggleButton) findViewById(R.id.screen_sharing_toggle); 91 } 92 93 @Override 94 public void onDestroy() { 95 super.onDestroy(); 96 if (mMediaProjection != null) { 97 mMediaProjection.stop(); 98 mMediaProjection = null; 99 } 100 } 101 102 @Override 103 public void onActivityResult(int requestCode, int resultCode, Intent data) { 104 if (requestCode != PERMISSION_CODE) { 105 Log.e(TAG, "Unknown request code: " + requestCode); 106 return; 107 } 108 if (resultCode != RESULT_OK) { 109 Toast.makeText(this, 110 "User denied screen sharing permission", Toast.LENGTH_SHORT).show(); 111 return; 112 } 113 mMediaProjection = mProjectionManager.getMediaProjection(resultCode, data); 114 mMediaProjection.registerCallback(new MediaProjectionCallback(), null); 115 mVirtualDisplay = createVirtualDisplay(); 116 } 117 118 public void onToggleScreenShare(View view) { 119 if (((ToggleButton) view).isChecked()) { 120 shareScreen(); 121 } else { 122 stopScreenSharing(); 123 } 124 } 125 126 private void shareScreen() { 127 mScreenSharing = true; 128 if (mSurface == null) { 129 return; 130 } 131 if (mMediaProjection == null) { 132 startActivityForResult(mProjectionManager.createScreenCaptureIntent(), 133 PERMISSION_CODE); 134 return; 135 } 136 mVirtualDisplay = createVirtualDisplay(); 137 } 138 139 private void stopScreenSharing() { 140 if (mToggle.isChecked()) { 141 mToggle.setChecked(false); 142 } 143 mScreenSharing = false; 144 if (mVirtualDisplay != null) { 145 mVirtualDisplay.release(); 146 mVirtualDisplay = null; 147 } 148 } 149 150 private VirtualDisplay createVirtualDisplay() { 151 return mMediaProjection.createVirtualDisplay("ScreenSharingDemo", 152 mDisplayWidth, mDisplayHeight, mScreenDensity, 153 DisplayManager.VIRTUAL_DISPLAY_FLAG_AUTO_MIRROR, 154 mSurface, null /*Callbacks*/, null /*Handler*/); 155 } 156 157 private void resizeVirtualDisplay() { 158 if (mVirtualDisplay == null) { 159 return; 160 } 161 mVirtualDisplay.resize(mDisplayWidth, mDisplayHeight, mScreenDensity); 162 } 163 164 private class ResolutionSelector implements Spinner.OnItemSelectedListener { 165 @Override 166 public void onItemSelected(AdapterView<?> parent, View v, int pos, long id) { 167 Resolution r = (Resolution) parent.getItemAtPosition(pos); 168 ViewGroup.LayoutParams lp = mSurfaceView.getLayoutParams(); 169 if (getResources().getConfiguration().orientation 170 == Configuration.ORIENTATION_LANDSCAPE) { 171 mDisplayHeight = r.y; 172 mDisplayWidth = r.x; 173 } else { 174 mDisplayHeight = r.x; 175 mDisplayWidth = r.y; 176 } 177 lp.height = mDisplayHeight; 178 lp.width = mDisplayWidth; 179 mSurfaceView.setLayoutParams(lp); 180 } 181 182 @Override 183 public void onNothingSelected(AdapterView<?> parent) { /* Ignore */ } 184 } 185 186 private class MediaProjectionCallback extends MediaProjection.Callback { 187 @Override 188 public void onStop() { 189 mMediaProjection = null; 190 stopScreenSharing(); 191 } 192 } 193 194 private class SurfaceCallbacks implements SurfaceHolder.Callback { 195 @Override 196 public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { 197 mDisplayWidth = width; 198 mDisplayHeight = height; 199 resizeVirtualDisplay(); 200 } 201 202 @Override 203 public void surfaceCreated(SurfaceHolder holder) { 204 mSurface = holder.getSurface(); 205 if (mScreenSharing) { 206 shareScreen(); 207 } 208 } 209 210 @Override 211 public void surfaceDestroyed(SurfaceHolder holder) { 212 if (!mScreenSharing) { 213 stopScreenSharing(); 214 } 215 } 216 } 217 218 private static class Resolution { 219 int x; 220 int y; 221 222 public Resolution(int x, int y) { 223 this.x = x; 224 this.y = y; 225 } 226 227 @Override 228 public String toString() { 229 return x + "x" + y; 230 } 231 } 232 } 233
