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我想在我的主要活动中按下一个按钮，该按钮将启动一个带有片段的新活动的意图。我写了一个带有 MainActivity 按钮的 main_activity.xml 和一个带有片段的 second_activity.xml。当我单击按钮时，第二个 Activity 将由于 xml 中的片段而崩溃。我已经添加了一个标志，但它没有帮助。该应用程序的想法是通过在主要活动中按下一个按钮来在第二个活动中获取谷歌地图。

我希望你能帮帮我 ：/

主要活动：

import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;

public class MainActivity extends Activity implements OnClickListener {

    private Button mButton;

    private static final String TAG = Thread.class.getSimpleName();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        Log.d(TAG, "+++++ onCreate() +++++");
        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);
        mButton = (Button) findViewById(R.id.mapButton);
        mButton.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                Log.d(TAG, "+++++ onClick() +++++");
                // TODO Auto-generated method stub
                Intent intent = new Intent(MainActivity.this, SubMain.class);
                intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                startActivity(intent);
            }
        });

    }

    protected void onStart() {
        Log.d(TAG, "+++++ onStart() +++++");
        super.onStart();

    }

    protected void onPause() {
        Log.d(TAG, "+++++ onPause() +++++");
        super.onPause();

    }

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

    @Override
    public void onClick(View v) {
        // TODO Auto-generated method stub
    }
}

子活动：

public class SubMain extends MainActivity {

    private static final String TAG = SubMain.class.getSimpleName();

    protected void onCreate(Bundle savedInstanceState) {
        Log.d(TAG, "+++++ onCreate().SubMain +++++");
        super.onCreate(savedInstanceState);
        setContentView(R.layout.submain);
    }

}

活动主.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"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
         />

    <Button
        android:id="@+id/mapButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBottom="@+id/textView1"
        android:layout_alignParentLeft="true"
        android:layout_alignParentRight="true"
        android:text="Map" />

</RelativeLayout>

submain.xml：

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

    <fragment
        android:id="@+id/fragment1"
        android:name="com.google.android.gms.maps.MapFragment"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

</LinearLayout>

日志猫：

11-13 14:48:24.395: D/Thread(30503): +++++ onCreate() +++++
11-13 14:48:24.465: D/Thread(30503): +++++ onStart() +++++
11-13 14:48:24.475: D/Thread(30503): +++++ run() +++++
11-13 14:48:24.480: D/Thread(30503): Thread is running
11-13 14:48:24.980: D/Thread(30503): Thread is running
11-13 14:48:25.485: D/Thread(30503): Thread is running
11-13 14:48:25.985: D/Thread(30503): Thread is running
11-13 14:48:26.485: D/Thread(30503): Thread is running
11-13 14:48:26.985: D/Thread(30503): Thread is running
11-13 14:48:27.240: D/Thread(30503): +++++ onClick() +++++
11-13 14:48:27.270: D/Thread(30503): +++++ onPause() +++++
11-13 14:48:27.305: D/SubMain(30503): +++++ onCreate().SubMain +++++
11-13 14:48:27.305: D/Thread(30503): +++++ onCreate() +++++
11-13 14:48:27.320: D/AndroidRuntime(30503): Shutting down VM
11-13 14:48:27.320: W/dalvikvm(30503): threadid=1: thread exiting with uncaught exception (group=0x41da92a0)
11-13 14:48:27.345: E/AndroidRuntime(30503): FATAL EXCEPTION: main
11-13 14:48:27.345: E/AndroidRuntime(30503): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.thread/com.example.thread.SubMain}: android.view.InflateException: Binary XML file line #7: Error inflating class fragment
11-13 14:48:27.345: E/AndroidRuntime(30503):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2100)
11-13 14:48:27.345: E/AndroidRuntime(30503):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2125)
11-13 14:48:27.345: E/AndroidRuntime(30503):    at android.app.ActivityThread.access$600(ActivityThread.java:140)
11-13 14:48:27.345: E/AndroidRuntime(30503):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1227)
11-13 14:48:27.345: E/AndroidRuntime(30503):    at android.os.Handler.dispatchMessage(Handler.java:99)
11-13 14:48:27.345: E/AndroidRuntime(30503):    at android.os.Looper.loop(Looper.java:137)
11-13 14:48:27.345: E/AndroidRuntime(30503):    at android.app.ActivityThread.main(ActivityThread.java:4898)
11-13 14:48:27.345: E/AndroidRuntime(30503):    at java.lang.reflect.Method.invokeNative(Native Method)
11-13 14:48:27.345: E/AndroidRuntime(30503):    at java.lang.reflect.Method.invoke(Method.java:511)
11-13 14:48:27.345: E/AndroidRuntime(30503):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1006)
11-13 14:48:27.345: E/AndroidRuntime(30503):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:773)
11-13 14:48:27.345: E/AndroidRuntime(30503):    at dalvik.system.NativeStart.main(Native Method)
11-13 14:48:27.345: E/AndroidRuntime(30503): Caused by: android.view.InflateException: Binary XML file line #7: Error inflating class fragment
11-13 14:48:27.345: E/AndroidRuntime(30503):    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704)
11-13 14:48:27.345: E/AndroidRuntime(30503):    at android.view.LayoutInflater.rInflate(LayoutInflater.java:746)
11-13 14:48:27.345: E/AndroidRuntime(30503):    at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
11-13 14:48:27.345: E/AndroidRuntime(30503):    at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
11-13 14:48:27.345: E/AndroidRuntime(30503):    at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
11-13 14:48:27.345: E/AndroidRuntime(30503):    at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:308)
11-13 14:48:27.345: E/AndroidRuntime(30503):    at android.app.Activity.setContentView(Activity.java:1924)
11-13 14:48:27.345: E/AndroidRuntime(30503):    at com.example.thread.SubMain.onCreate(SubMain.java:13)
11-13 14:48:27.345: E/AndroidRuntime(30503):    at android.app.Activity.performCreate(Activity.java:5206)
4

1 回答 1

0

问题已解决：我在 android manifest 中的元数据行有误……真是个愚蠢的错误。>.<

贝弗：

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

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="18" />

    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.example.thread.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name="com.example.thread.SubMain"
            android:label="@string/app_name" >
            <meta-data
                android:name="com.google.android.maps.v2.API_KEY"
                android:value="AIzaSyCpP0eOduM6JF6w8i7xybZgIiZopG4tOVI" /> <!-- wrong line! -->
        </activity>
    </application>

</manifest>

后：

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

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="18" />

    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.example.thread.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name="com.example.thread.SubMain"
            android:label="@string/app_name" >
        </activity>

        <meta-data
            android:name="com.google.android.maps.v2.API_KEY"
            android:value="MY_GOOGLE_API_KEY" />
    </application>

</manifest>
于 2013-11-14T08:28:02.260 回答