Question

https://drive.google.com/open?id=12rzhjzYvWTKGIQhlhP5OSCINhOAWCU73我想使用Android中的Web视图显示来自YouTube的音频和视频，但是在我的移动设备上，播放视频时黑屏。音频正常播放。

我给您提供两个代码，一个代码可以成功显示音频和视频（代码1）。第二个代码（代码2）仅成功显示音频。为什么会这样？即使没有任何变化，只是不同的you_tube页面的来源

代码1：

package inducesmile.com.playvideoinandroid;

import android.annotation.TargetApi;
import android.os.Build;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.webkit.WebChromeClient;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.FrameLayout;
import android.widget.RelativeLayout;


public class MainActivity extends ActionBarActivity {

    private MyWebChromeClient mWebChromeClient = null;
    private View mCustomView;
    private RelativeLayout mContentView;
    private FrameLayout mCustomViewContainer;
    private WebChromeClient.CustomViewCallback mCustomViewCallback;

    private WebView myWebView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        myWebView = (WebView) findViewById(R.id.webView);
        mWebChromeClient = new MyWebChromeClient();
        myWebView.setWebChromeClient(mWebChromeClient);
        myWebView.setWebViewClient(new WebViewClient(){
            @Override
            public boolean shouldOverrideUrlLoading(WebView view, String url) {
                return false;
            }
        });
        WebSettings webSettings = myWebView.getSettings();
        webSettings.setJavaScriptEnabled(true);
        myWebView.loadUrl("https://murid.gkdi.org/test/out.html");
   }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }
    public class MyWebChromeClient extends WebChromeClient {

        FrameLayout.LayoutParams LayoutParameters = new FrameLayout.LayoutParams(FrameLayout.LayoutParams.MATCH_PARENT, FrameLayout.LayoutParams.MATCH_PARENT);

        @Override
        public void onShowCustomView(View view, CustomViewCallback callback) {
            // if a view already exists then immediately terminate the new one
            if (mCustomView != null) {
                callback.onCustomViewHidden();
                return;
            }
            mContentView = (RelativeLayout) findViewById(R.id.activity_main);
            mContentView.setVisibility(View.GONE);
            mCustomViewContainer = new FrameLayout(MainActivity.this);
            mCustomViewContainer.setLayoutParams(LayoutParameters);
            mCustomViewContainer.setBackgroundResource(android.R.color.black);
            view.setLayoutParams(LayoutParameters);
            mCustomViewContainer.addView(view);
            mCustomView = view;
            mCustomViewCallback = callback;
            mCustomViewContainer.setVisibility(View.VISIBLE);
            setContentView(mCustomViewContainer);
        }

        @TargetApi(Build.VERSION_CODES.ECLAIR_MR1)
        @Override
        public void onHideCustomView() {
            if (mCustomView == null) {
                return;
            } else {
                // Hide the custom view.
                mCustomView.setVisibility(View.GONE);
                // Remove the custom view from its container.
                mCustomViewContainer.removeView(mCustomView);
                mCustomView = null;
                mCustomViewContainer.setVisibility(View.GONE);
                mCustomViewCallback.onCustomViewHidden();
                // Show the content view.
                mContentView.setVisibility(View.VISIBLE);
                setContentView(mContentView);
            }
        }
    }
    @Override
    public void onBackPressed() {
        if (mCustomViewContainer != null)
            mWebChromeClient.onHideCustomView();
        else if (myWebView.canGoBack())
            myWebView.goBack();
        else
            super.onBackPressed();
    }
}

这是我的代码2：

package inducesmile.com.playvideoinandroid;

import android.annotation.TargetApi;
import android.os.Build;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.webkit.WebChromeClient;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.FrameLayout;
import android.widget.RelativeLayout;


public class MainActivity extends ActionBarActivity {

    private MyWebChromeClient mWebChromeClient = null;
    private View mCustomView;
    private RelativeLayout mContentView;
    private FrameLayout mCustomViewContainer;
    private WebChromeClient.CustomViewCallback mCustomViewCallback;

    private WebView myWebView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        myWebView = (WebView) findViewById(R.id.webView);
        mWebChromeClient = new MyWebChromeClient();
        myWebView.setWebChromeClient(mWebChromeClient);
        myWebView.setWebViewClient(new WebViewClient(){
            @Override
            public boolean shouldOverrideUrlLoading(WebView view, String url) {
                return false;
            }
        });
        WebSettings webSettings = myWebView.getSettings();
        webSettings.setJavaScriptEnabled(true);

        myWebView.loadUrl("https://murid.gkdi.org/test/in.html");


    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }
    public class MyWebChromeClient extends WebChromeClient {

        FrameLayout.LayoutParams LayoutParameters = new FrameLayout.LayoutParams(FrameLayout.LayoutParams.MATCH_PARENT, FrameLayout.LayoutParams.MATCH_PARENT);

        @Override
        public void onShowCustomView(View view, CustomViewCallback callback) {
            // if a view already exists then immediately terminate the new one
            if (mCustomView != null) {
                callback.onCustomViewHidden();
                return;
            }
            mContentView = (RelativeLayout) findViewById(R.id.activity_main);
            mContentView.setVisibility(View.GONE);
            mCustomViewContainer = new FrameLayout(MainActivity.this);
            mCustomViewContainer.setLayoutParams(LayoutParameters);
            mCustomViewContainer.setBackgroundResource(android.R.color.black);
            view.setLayoutParams(LayoutParameters);
            mCustomViewContainer.addView(view);
            mCustomView = view;
            mCustomViewCallback = callback;
            mCustomViewContainer.setVisibility(View.VISIBLE);
            setContentView(mCustomViewContainer);
        }

        @TargetApi(Build.VERSION_CODES.ECLAIR_MR1)
        @Override
        public void onHideCustomView() {
            if (mCustomView == null) {
                return;
            } else {
                // Hide the custom view.
                mCustomView.setVisibility(View.GONE);
                // Remove the custom view from its container.
                mCustomViewContainer.removeView(mCustomView);
                mCustomView = null;
                mCustomViewContainer.setVisibility(View.GONE);
                mCustomViewCallback.onCustomViewHidden();
                // Show the content view.
                mContentView.setVisibility(View.VISIBLE);
                setContentView(mContentView);
            }
        }
    }
    @Override
    public void onBackPressed() {
        if (mCustomViewContainer != null)
            mWebChromeClient.onHideCustomView();
        else if (myWebView.canGoBack())
            myWebView.goBack();
        else
            super.onBackPressed();
    }
}

Answer 1

使用youtube的视频API在android应用中播放youtube视频

https://developers.google.com/youtube/iframe_api_reference

YouTube仅在WebView中播放音频

1 个答案: