| // Copyright 2013 The Flutter Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| package dev.flutter.scenarios; |
| |
| import android.annotation.TargetApi; |
| import android.content.Context; |
| import android.graphics.Canvas; |
| import android.graphics.Color; |
| import android.graphics.Paint; |
| import android.graphics.SurfaceTexture; |
| import android.view.Choreographer; |
| import android.view.TextureView; |
| import android.view.View; |
| import androidx.annotation.NonNull; |
| import androidx.annotation.Nullable; |
| import io.flutter.Log; |
| import io.flutter.plugin.common.MessageCodec; |
| import io.flutter.plugin.common.StringCodec; |
| import io.flutter.plugin.platform.PlatformView; |
| import io.flutter.plugin.platform.PlatformViewFactory; |
| import java.nio.ByteBuffer; |
| |
| @TargetApi(23) |
| public final class TexturePlatformViewFactory extends PlatformViewFactory { |
| TexturePlatformViewFactory() { |
| super( |
| new MessageCodec<Object>() { |
| @Nullable |
| @Override |
| public ByteBuffer encodeMessage(@Nullable Object o) { |
| if (o instanceof String) { |
| return StringCodec.INSTANCE.encodeMessage((String) o); |
| } |
| return null; |
| } |
| |
| @Nullable |
| @Override |
| public Object decodeMessage(@Nullable ByteBuffer byteBuffer) { |
| return StringCodec.INSTANCE.decodeMessage(byteBuffer); |
| } |
| }); |
| } |
| |
| @SuppressWarnings("unchecked") |
| @Override |
| @NonNull |
| public PlatformView create(@NonNull Context context, int id, @Nullable Object args) { |
| return new TexturePlatformView(context); |
| } |
| |
| private static class TexturePlatformView implements PlatformView { |
| static String TAG = "TexturePlatformView"; |
| |
| final TextureView textureView; |
| |
| @SuppressWarnings("unchecked") |
| TexturePlatformView(@NonNull final Context context) { |
| textureView = new TextureView(context); |
| textureView.setSurfaceTextureListener( |
| new TextureView.SurfaceTextureListener() { |
| @Override |
| public void onSurfaceTextureAvailable(SurfaceTexture surface, int width, int height) { |
| Log.i(TAG, "onSurfaceTextureAvailable"); |
| final Canvas canvas = textureView.lockCanvas(); |
| canvas.drawColor(Color.WHITE); |
| |
| final Paint paint = new Paint(); |
| paint.setColor(Color.GREEN); |
| canvas.drawCircle(canvas.getWidth() / 2, canvas.getHeight() / 2, 20, paint); |
| textureView.unlockCanvasAndPost(canvas); |
| Choreographer.getInstance() |
| .postFrameCallbackDelayed( |
| new Choreographer.FrameCallback() { |
| @Override |
| public void doFrame(long frameTimeNanos) { |
| textureView.invalidate(); |
| } |
| }, |
| 500); |
| } |
| |
| @Override |
| public boolean onSurfaceTextureDestroyed(SurfaceTexture surface) { |
| Log.i(TAG, "onSurfaceTextureDestroyed"); |
| return true; |
| } |
| |
| @Override |
| public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width, int height) { |
| Log.i(TAG, "onSurfaceTextureSizeChanged"); |
| } |
| |
| @Override |
| public void onSurfaceTextureUpdated(SurfaceTexture surface) { |
| Log.i(TAG, "onSurfaceTextureUpdated"); |
| } |
| }); |
| } |
| |
| @Override |
| @NonNull |
| public View getView() { |
| return textureView; |
| } |
| |
| @Override |
| public void dispose() {} |
| } |
| } |