Java Android：在webview加载完url之前，我如何制作启动屏幕？

在webview加载完url之前，如何创建初始屏幕

我的档案

MainActivity.java SplashActivity.java

public class MainActivity extends Activity {
    WebView website;
    @SuppressLint("SetJavaScriptEnabled")
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);


        getWindow().requestFeature(Window.FEATURE_PROGRESS);
                setContentView(R.layout.activity_main);
        final Activity activity = this;

        website = (WebView)findViewById(R.id.webView1);
        website.getSettings().setJavaScriptEnabled(true);
        website.setWebViewClient(new WebViewClient()
                {   
             @Override
             public boolean shouldOverrideUrlLoading(WebView view, String url) {
             return false;
             }  
        });
        website.setWebChromeClient(new WebChromeClient() {
            public void onProgressChanged(WebView view, int progress) 
               {
                activity.setTitle("Loading...");
                activity.setProgress(progress * 100);
                if(progress == 100)
                  activity.setTitle(website.getTitle());
                WebView browser = (WebView) findViewById(R.id.webView1);
                browser.getSettings().setLoadWithOverviewMode(true);
                browser.getSettings().setUseWideViewPort(true); 
                }
        });


        website.loadUrl("http://*********.com/");
    }

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

}

import java.util.Timer;
import java.util.TimerTask;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import com.jehad4t.stikana.R;

public class SplashActivity extends Activity {
    private long splashDelay = 5000; //5 seconds

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.splash);

        TimerTask task = new TimerTask()
        {

            @Override
            public void run() {
                finish();
                Intent mainIntent = new Intent().setClass(SplashActivity.this, MainActivity.class);
                startActivity(mainIntent);
            }

        };

        Timer timer = new Timer();
        timer.schedule(task, splashDelay);
    }
}

splash.xml activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity" 
    >

    <WebView
        android:id="@+id/webView1"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:visibility="gone"
       />

</RelativeLayout>

代码MainActivity.java

public class MainActivity extends Activity {
    WebView website;
    @SuppressLint("SetJavaScriptEnabled")
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);


        getWindow().requestFeature(Window.FEATURE_PROGRESS);
                setContentView(R.layout.activity_main);
        final Activity activity = this;

        website = (WebView)findViewById(R.id.webView1);
        website.getSettings().setJavaScriptEnabled(true);
        website.setWebViewClient(new WebViewClient()
                {   
             @Override
             public boolean shouldOverrideUrlLoading(WebView view, String url) {
             return false;
             }  
        });
        website.setWebChromeClient(new WebChromeClient() {
            public void onProgressChanged(WebView view, int progress) 
               {
                activity.setTitle("Loading...");
                activity.setProgress(progress * 100);
                if(progress == 100)
                  activity.setTitle(website.getTitle());
                WebView browser = (WebView) findViewById(R.id.webView1);
                browser.getSettings().setLoadWithOverviewMode(true);
                browser.getSettings().setUseWideViewPort(true); 
                }
        });


        website.loadUrl("http://*********.com/");
    }

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

}

import java.util.Timer;
import java.util.TimerTask;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import com.jehad4t.stikana.R;

public class SplashActivity extends Activity {
    private long splashDelay = 5000; //5 seconds

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.splash);

        TimerTask task = new TimerTask()
        {

            @Override
            public void run() {
                finish();
                Intent mainIntent = new Intent().setClass(SplashActivity.this, MainActivity.class);
                startActivity(mainIntent);
            }

        };

        Timer timer = new Timer();
        timer.schedule(task, splashDelay);
    }
}

代码SplashActivity.java

public class MainActivity extends Activity {
    WebView website;
    @SuppressLint("SetJavaScriptEnabled")
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);


        getWindow().requestFeature(Window.FEATURE_PROGRESS);
                setContentView(R.layout.activity_main);
        final Activity activity = this;

        website = (WebView)findViewById(R.id.webView1);
        website.getSettings().setJavaScriptEnabled(true);
        website.setWebViewClient(new WebViewClient()
                {   
             @Override
             public boolean shouldOverrideUrlLoading(WebView view, String url) {
             return false;
             }  
        });
        website.setWebChromeClient(new WebChromeClient() {
            public void onProgressChanged(WebView view, int progress) 
               {
                activity.setTitle("Loading...");
                activity.setProgress(progress * 100);
                if(progress == 100)
                  activity.setTitle(website.getTitle());
                WebView browser = (WebView) findViewById(R.id.webView1);
                browser.getSettings().setLoadWithOverviewMode(true);
                browser.getSettings().setUseWideViewPort(true); 
                }
        });


        website.loadUrl("http://*********.com/");
    }

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

}

import java.util.Timer;
import java.util.TimerTask;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import com.jehad4t.stikana.R;

public class SplashActivity extends Activity {
    private long splashDelay = 5000; //5 seconds

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.splash);

        TimerTask task = new TimerTask()
        {

            @Override
            public void run() {
                finish();
                Intent mainIntent = new Intent().setClass(SplashActivity.this, MainActivity.class);
                startActivity(mainIntent);
            }

        };

        Timer timer = new Timer();
        timer.schedule(task, splashDelay);
    }
}

代码splash.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content">

  <ImageView
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:src="@drawable/splash" />

</LinearLayout>

代码活动_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity" 
    >

    <WebView
        android:id="@+id/webView1"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:visibility="gone"
       />

</RelativeLayout>

---

在活动更改中：

专用长延时=5000至
专用长延时=0

       @Override
        public void run() {
            finish();
            Intent mainIntent = new Intent().setClass(SplashActivity.this, MainActivity.class);
            overridePendingTransition(0, 0);
            startActivity(mainIntent);
        }

在MainActivity XML文件中：添加一个linearlayout。
在MainActivity java文件中：将您的splash图像提供给您在splash.java文件中提供的线性布局。
像mLayout.setBackgroundResource（R.drawable.splash）

这对我很有用。
尝试使用WebViewClient，它有一个onPageFinished方法。我的代码中的示例：

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

    //make your splash visible here

    WebView browser = (WebView) findViewById(R.id.yourWebView);
    //remove flicker
    browser.setLayerType(View.LAYER_TYPE_SOFTWARE, null);
    browser.setWebViewClient(new WebViewClient() {
        @Override
        public void onPageFinished(WebView view, String url) {
            //make it invisible here
        }
    });

    browser.loadUrl("file:///android_asset/whatever.html");
}

我照你说的做，但是。挫折资源（R.drawable.splash）；错误您的drawable文件夹中是否有splash.png文件？请清理您的项目，然后再试一次。我将其设置为apk，并将其安装在移动设备上，但（（不幸的是，appname已停止。）请检查此应用程序：此应用程序的行为与您希望在应用程序中的行为相同。我知道这是一个非常旧的线程。但现在我遇到了类似的问题。在您的解决方案中，您要求webview在后台加载到哪里。当我使用这种代码时，初始屏幕会在给定的延迟内显示，然后webview会按顺序加载。在开始MainActivity之前，没有完成加载url的后台工作。