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pick from v1.12.13_xianyu
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‎android/src/main/java/com/idlefish/flutterboost/XFlutterTextureView.java‎

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package com.idlefish.flutterboost;
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import android.content.Context;
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import android.graphics.SurfaceTexture;
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import android.util.AttributeSet;
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import android.view.Surface;
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import android.view.TextureView;
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import androidx.annotation.NonNull;
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import androidx.annotation.Nullable;
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import io.flutter.Log;
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import io.flutter.embedding.engine.renderer.FlutterRenderer;
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import io.flutter.embedding.engine.renderer.RenderSurface;
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public class XFlutterTextureView extends TextureView implements RenderSurface {
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private static final String TAG = "FlutterTextureView";
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private boolean isSurfaceAvailableForRendering = false;
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private boolean isAttachedToFlutterRenderer = false;
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@Nullable
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private FlutterRenderer flutterRenderer;
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private Surface renderSurface;
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// Connects the {@code SurfaceTexture} beneath this {@code TextureView} with Flutter's native code.
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// Callbacks are received by this Object and then those messages are forwarded to our
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// FlutterRenderer, and then on to the JNI bridge over to native Flutter code.
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private final SurfaceTextureListener surfaceTextureListener = new SurfaceTextureListener() {
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@Override
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public void onSurfaceTextureAvailable(SurfaceTexture surfaceTexture, int width, int height) {
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Log.v(TAG, "SurfaceTextureListener.onSurfaceTextureAvailable()");
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isSurfaceAvailableForRendering = true;
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// If we're already attached to a FlutterRenderer then we're now attached to both a renderer
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// and the Android window, so we can begin rendering now.
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if (isAttachedToFlutterRenderer) {
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connectSurfaceToRenderer();
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}
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}
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@Override
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public void onSurfaceTextureSizeChanged(@NonNull SurfaceTexture surface, int width, int height) {
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Log.v(TAG, "SurfaceTextureListener.onSurfaceTextureSizeChanged()");
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if (isAttachedToFlutterRenderer) {
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changeSurfaceSize(width, height);
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}
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}
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@Override
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public void onSurfaceTextureUpdated(@NonNull SurfaceTexture surface) {
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// Invoked every time a new frame is available. We don't care.
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}
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@Override
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public boolean onSurfaceTextureDestroyed(@NonNull SurfaceTexture surface) {
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Log.v(TAG, "SurfaceTextureListener.onSurfaceTextureDestroyed()");
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isSurfaceAvailableForRendering = false;
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// If we're attached to a FlutterRenderer then we need to notify it that our SurfaceTexture
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// has been destroyed.
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if (isAttachedToFlutterRenderer) {
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disconnectSurfaceFromRenderer();
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}
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// Return true to indicate that no further painting will take place
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// within this SurfaceTexture.
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return true;
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}
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};
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/**
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* Constructs a {@code FlutterTextureView} programmatically, without any XML attributes.
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*/
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public XFlutterTextureView(@NonNull Context context) {
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this(context, null);
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}
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/**
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* Constructs a {@code FlutterTextureView} in an XML-inflation-compliant manner.
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*/
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public XFlutterTextureView(@NonNull Context context, @Nullable AttributeSet attrs) {
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super(context, attrs);
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init();
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}
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private void init() {
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// Listen for when our underlying SurfaceTexture becomes available, changes size, or
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// gets destroyed, and take the appropriate actions.
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setSurfaceTextureListener(surfaceTextureListener);
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}
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@Nullable
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@Override
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public FlutterRenderer getAttachedRenderer() {
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return flutterRenderer;
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}
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/**
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* Invoked by the owner of this {@code FlutterTextureView} when it wants to begin rendering
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* a Flutter UI to this {@code FlutterTextureView}.
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*
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* If an Android {@link SurfaceTexture} is available, this method will give that
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* {@link SurfaceTexture} to the given {@link FlutterRenderer} to begin rendering
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* Flutter's UI to this {@code FlutterTextureView}.
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*
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* If no Android {@link SurfaceTexture} is available yet, this {@code FlutterTextureView}
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* will wait until a {@link SurfaceTexture} becomes available and then give that
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* {@link SurfaceTexture} to the given {@link FlutterRenderer} to begin rendering
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* Flutter's UI to this {@code FlutterTextureView}.
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*/
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public void attachToRenderer(@NonNull FlutterRenderer flutterRenderer) {
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Log.v(TAG, "Attaching to FlutterRenderer.");
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if (this.flutterRenderer != null) {
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Log.v(TAG, "Already connected to a FlutterRenderer. Detaching from old one and attaching to new one.");
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this.flutterRenderer.stopRenderingToSurface();
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}
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this.flutterRenderer = flutterRenderer;
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isAttachedToFlutterRenderer = true;
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// If we're already attached to an Android window then we're now attached to both a renderer
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// and the Android window. We can begin rendering now.
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if (isSurfaceAvailableForRendering) {
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Log.v(TAG, "Surface is available for rendering. Connecting FlutterRenderer to Android surface.");
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connectSurfaceToRenderer();
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}
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}
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/**
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* Invoked by the owner of this {@code FlutterTextureView} when it no longer wants to render
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* a Flutter UI to this {@code FlutterTextureView}.
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*
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* This method will cease any on-going rendering from Flutter to this {@code FlutterTextureView}.
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*/
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public void detachFromRenderer() {
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if (flutterRenderer != null) {
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// If we're attached to an Android window then we were rendering a Flutter UI. Now that
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// this FlutterTextureView is detached from the FlutterRenderer, we need to stop rendering.
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// TODO(mattcarroll): introduce a isRendererConnectedToSurface() to wrap "getWindowToken() != null"
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if (getWindowToken() != null) {
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Log.v(TAG, "Disconnecting FlutterRenderer from Android surface.");
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disconnectSurfaceFromRenderer();
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}
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flutterRenderer = null;
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isAttachedToFlutterRenderer = false;
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} else {
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Log.w(TAG, "detachFromRenderer() invoked when no FlutterRenderer was attached.");
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}
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}
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// FlutterRenderer and getSurfaceTexture() must both be non-null.
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private void connectSurfaceToRenderer() {
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if (flutterRenderer == null || getSurfaceTexture() == null) {
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throw new IllegalStateException("connectSurfaceToRenderer() should only be called when flutterRenderer and getSurfaceTexture() are non-null.");
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}
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// flutterRenderer.startRenderingToSurface(new Surface(getSurfaceTexture()));
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renderSurface = new Surface(getSurfaceTexture());
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flutterRenderer.startRenderingToSurface(renderSurface);
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}
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// FlutterRenderer must be non-null.
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private void changeSurfaceSize(int width, int height) {
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if (flutterRenderer == null) {
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throw new IllegalStateException("changeSurfaceSize() should only be called when flutterRenderer is non-null.");
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}
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Log.v(TAG, "Notifying FlutterRenderer that Android surface size has changed to " + width + " x " + height);
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flutterRenderer.surfaceChanged(width, height);
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}
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// FlutterRenderer must be non-null.
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private void disconnectSurfaceFromRenderer() {
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if (flutterRenderer == null) {
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throw new IllegalStateException("disconnectSurfaceFromRenderer() should only be called when flutterRenderer is non-null.");
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}
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flutterRenderer.stopRenderingToSurface();
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renderSurface.release();
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renderSurface = null;
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}
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}

‎android/src/main/java/com/idlefish/flutterboost/XFlutterView.java‎

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@@ -38,7 +38,6 @@
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import io.flutter.embedding.engine.renderer.FlutterRenderer;
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import io.flutter.embedding.engine.renderer.FlutterUiDisplayListener;
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import io.flutter.embedding.engine.renderer.RenderSurface;
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import io.flutter.embedding.engine.systemchannels.TextInputChannel;
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import io.flutter.plugin.editing.TextInputPlugin;
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import io.flutter.plugin.platform.PlatformViewsController;
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import io.flutter.view.AccessibilityBridge;
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break;
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case texture:
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Log.v(TAG, "Internally using a FlutterTextureView.");
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FlutterTextureView flutterTextureView = new FlutterTextureView(getContext());
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XFlutterTextureView flutterTextureView = new XFlutterTextureView(getContext());
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renderSurface = flutterTextureView;
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addView(flutterTextureView);
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break;

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