启动时启动活动

Question

我想在手机启动后启动我的应用程序.显然应用程序是在启动后启动但它立即崩溃(只是为了清楚应用程序通常工作正常).我已经阅读并尝试了不同的解决方案(link1,link2),实际上相同的代码与我正在开发的另一个应用程序正常工作.这是代码:

AndroidManifest.xml中:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.bluetoothx10y"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="6"
        android:targetSdkVersion="15" />

    <uses-feature android:name="android.hardware.usb.accessory"/>
    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
    <uses-permission android:name="android.permission.WRITE_INTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.BLUETOOTH"/>
    <uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>
    <uses-permission android:name="android.permission.DISABLE_KEYGUARD"/>

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

        <receiver
            android:name=".StartMyActivityAtBootReceiver"
            android:enabled="true"
            android:exported="true">
            <intent-filter>
                <action android:name="android.intent.action.BOOT_COMPLETED" />
            </intent-filter>
        </receiver>


        <activity
            android:name=".MainActivity"
            android:label="@string/app_name"
            android:screenOrientation="landscape" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>

            <intent-filter>
               <action android:name="android.hardware.usb.action.USB_ACCESSORY_ATTACHED"/>
            </intent-filter>

            <meta-data 
                android:name="android.hardware.usb.action.USB_ACCESSORY_ATTACHED"
                android:resource="@xml/accessory_filter">
            </meta-data>

        </activity>

        <activity android:name=".DeviceListActivity"
              android:label="@string/app_name"
              android:theme="@android:style/Theme.Dialog"
              android:screenOrientation="landscape" />        
    </application>

</manifest>

StartMyActivityAtBootReceiver.java:

    public class StartMyActivityAtBootReceiver extends BroadcastReceiver {    
    @Override
    public void onReceive(Context context, Intent intent) {

        if ("android.intent.action.BOOT_COMPLETED".equals(intent.getAction())) {    

                Intent myStarterIntent = new Intent(context, MainActivity.class);
                myStarterIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                context.startActivity(myStarterIntent);

            }    
    }   
}

可能与我使用大量用户权限这一事实有关吗？

Answer 1

Try this:

1]在AndroidManifest.xml文件中:

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

 <application 
 ...
    <receiver
        android:name=".StartMyActivityAtBootReceiver"
        android:enabled="true"
        android:permission="android.permission.RECEIVE_BOOT_COMPLETED" >
        <intent-filter>
            <action android:name="android.intent.action.BOOT_COMPLETED" />

            <category android:name="android.intent.category.DEFAULT" />
        </intent-filter>
    </receiver>
 </application>

2]在BroadcastReciever类中使用StartMyActivityAtBootReceiver作为类名.

@Override
public void onReceive(Context context, Intent intent) {

    Intent i = new Intent(context, MainActivity.class);  
    i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    context.startActivity(i); 

} 

这对我有用.代码的区别如下:

• android:permission ="android.permission.RECEIVE_BOOT_COMPLETED"接收器内部.
• 包含"类别android:name ="android.intent.category.DEFAULT""内部意图过滤器.
• 我没有检查onRecieve的意图,因为我知道代码只有在真实时才会被执行

Answer 2

<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>    
<receiver android:name=".StartMyActivityAtBootReceiver"
                      android:enabled="true"
                      android:exported="true">
                <intent-filter>
                    <action android:name="android.intent.action.BOOT_COMPLETED"/>
                    <action android:name="android.intent.action.QUICKBOOT_POWERON"/>
                </intent-filter>
            </receiver>

Answer 3

我设法解决了这个问题。在 OnCreate() 内部，我有这段代码（与 USB 通信相关），它导致了崩溃：

    act_string = getIntent().getAction();
    if( -1 != act_string.indexOf("android.intent.action.MAIN")){
        restorePreference();
    }           
    else if( -1 != act_string.indexOf("android.hardware.usb.action.USB_ACCESSORY_ATTACHED")){
        cleanPreference();
    }   

删除此代码解决了启动后启动问题。