意图 - 不连接到 URL - 没有已知的活动来处理意图

Question

我正在尝试使用 eclipse android 编辑器将我的模拟器连接到网页。我一直在关注一些来自 android 的在线教程，并认为我已经解决了我的问题，但是我收到一个错误，即在尝试重定向到 google.com 时没有可用的操作来处理我的意图。有人知道我做错了什么吗？我在清单中添加了意图填充符并使用了正确的语法，但我不确定为什么我无法让模拟器重定向。任何帮助/建议将不胜感激，谢谢！

主活动

package com.example.webpage;

import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
           Button mButton = (Button) findViewById(R.id.button1);
            mButton.setOnClickListener(new OnClickListener() {

                public void onClick(View v) {
                    Uri uri = Uri.parse("http://www.google.com");
                    Intent intent = new Intent(Intent.ACTION_VIEW, uri);
                    startActivity(intent);


                }

            });

    }
}

清单

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

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="19" />
    <uses-permission android:name="android.permission.INTERNET" />
    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.example.webpage.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
            <intent-filter>
                <action android:name="android.intent.action.VIEW" />  
                <category android:name="android.intent.category.DEFAULT" />
    </intent-filter>
        </activity>
        <activity android:name="webpage"></activity>
    </application>

Logcat

06-06 16:39:37.090: E/AndroidRuntime(939): FATAL EXCEPTION: main
06-06 16:39:37.090: E/AndroidRuntime(939): Process: com.example.webpage, PID: 939
06-06 16:39:37.090: E/AndroidRuntime(939): android.content.ActivityNotFoundException: No Activity found to handle Intent { act=android.intent.action.VIEW dat=http://www.google.com }
06-06 16:39:37.090: E/AndroidRuntime(939):  at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1632)
06-06 16:39:37.090: E/AndroidRuntime(939):  at android.app.Instrumentation.execStartActivity(Instrumentation.java:1424)
06-06 16:39:37.090: E/AndroidRuntime(939):  at android.app.Activity.startActivityForResult(Activity.java:3424)
06-06 16:39:37.090: E/AndroidRuntime(939):  at android.app.Activity.startActivityForResult(Activity.java:3385)
06-06 16:39:37.090: E/AndroidRuntime(939):  at android.app.Activity.startActivity(Activity.java:3627)
06-06 16:39:37.090: E/AndroidRuntime(939):  at android.app.Activity.startActivity(Activity.java:3595)
06-06 16:39:37.090: E/AndroidRuntime(939):  at com.example.webpage.MainActivity$1.onClick(MainActivity.java:23)
06-06 16:39:37.090: E/AndroidRuntime(939):  at android.view.View.performClick(View.java:4438)
06-06 16:39:37.090: E/AndroidRuntime(939):  at android.view.View$PerformClick.run(View.java:18422)
06-06 16:39:37.090: E/AndroidRuntime(939):  at android.os.Handler.handleCallback(Handler.java:733)
06-06 16:39:37.090: E/AndroidRuntime(939):  at android.os.Handler.dispatchMessage(Handler.java:95)
06-06 16:39:37.090: E/AndroidRuntime(939):  at android.os.Looper.loop(Looper.java:136)
06-06 16:39:37.090: E/AndroidRuntime(939):  at android.app.ActivityThread.main(ActivityThread.java:5042)
06-06 16:39:37.090: E/AndroidRuntime(939):  at java.lang.reflect.Method.invokeNative(Native Method)
06-06 16:39:37.090: E/AndroidRuntime(939):  at java.lang.reflect.Method.invoke(Method.java:515)
06-06 16:39:37.090: E/AndroidRuntime(939):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:776)
06-06 16:39:37.090: E/AndroidRuntime(939):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
06-06 16:39:37.090: E/AndroidRuntime(939):  at dalvik.system.NativeStart.main(Native Method)

Answer 1

您必须以 http:// 或 https:// 开头的 Url 以避免ActivityNotFoundException

所以你应该像这样检查条件：

if (!url.startsWith("https://") && !url.startsWith("http://")){
    url = "http://" + url;
}
Intent it = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
startActivity(it);