android - WebView 不自动加载

Question

我正在尝试构建我的第一个应用程序，就这样。启动 -> 闪屏 -> 自动显示网页(全屏/无按钮触发)。但是，在启动画面之后，它只是一片空白。我猜想 MainActivity.java 中的 Intent 部分和 AndroidManifest.xml 中的 intent-filter 有问题。但我还不知道要解决这个问题。这是我的代码:

主 Activity .java

package com.myapp.splashscreen;

import android.app.Activity;
import android.os.Bundle;
import android.content.Intent;

public class MainActivity extends Activity {

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        Intent intent = new Intent(context, WebViewActivity.class);
        startActivity(intent);
    }

}

启动画面.java

package com.myapp.splashscreen;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;

public class SplashScreen extends Activity {

    private static final int SPLASH_TIME = 3 * 1000;// 3 seconds

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

        new Handler().postDelayed(new Runnable() {

            @Override
            public void run() {

                Intent intent = new Intent(SplashScreen.this,
                        MainActivity.class);
                startActivity(intent);

                SplashScreen.this.finish();

                overridePendingTransition(R.anim.fade_in, R.anim.fade_out);

            }
        }, SPLASH_TIME);

        new Handler().postDelayed(new Runnable() {
            @Override
            public void run() {
            }
        }, SPLASH_TIME);

    }


    @Override
    public void onBackPressed() {
        this.finish();
        super.onBackPressed();
    }
}

WebViewActivity.java

package com.myapp.splashscreen;

import android.app.Activity;
import android.os.Bundle;
import android.webkit.WebView;

public class WebViewActivity extends Activity {

    private WebView webView;

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.id.webView1);

        webView = (WebView) findViewById(R.id.webView1);
        webView.getSettings().setJavaScriptEnabled(true);
        webView.loadUrl("http://www.google.com");
    }

}

主.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="#d3d3d3"
    android:orientation="vertical">

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

</RelativeLayout>

启动画面.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:background="@drawable/splash"
    android:configChanges="orientation|keyboardHidden"
    android:orientation="vertical"
    android:screenOrientation="portrait">

</RelativeLayout>

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.myapp.splashscreen"
    android:versionCode="1"
    android:versionName="1.0">

    <uses-permission android:name="android.permission.INTERNET" />

    <uses-sdk android:minSdkVersion="8" />

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name">

        <activity
            android:name=".SplashScreen"
            android:theme="@android:style/Theme.Black.NoTitleBar">

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        <activity android:name=".MainActivity"></activity>

        <activity
            android:name=".WebViewActivity"
            android:theme="@android:style/Theme.NoTitleBar" />
    </application>
</manifest>

Answer 1

如果您希望顺序为 SplashActivity -> WebViewActivity

SplashActivity 的变化

 Intent intent = new Intent(SplashScreen.this,
                    MainActivity.class);

到

 Intent intent = new Intent(SplashScreen.this,
                    WebViewActivity.class);

这将告诉您应用程序它应该启动 WebViewActivity 而不是 MainActivity