Android 设置开放隐性启动Intent

来源：互联网发布：淘宝几点发布宝贝最好编辑：程序博客网时间：2024/04/29 23:47

开放“恢复出厂设置”的隐性启动Intent

在Settings的AndroidManifest.xml中开放了很多供开发者直接使用的action标签的intent-filter，可以调用一些常用的设置界面，如显示，Wi-Fi，位置信息和存储等，格式如下：

        <activity android:name="Settings$WifiSettingsActivity"                android:uiOptions="splitActionBarWhenNarrow"                android:taskAffinity=""                android:label="@string/wifi_settings"                android:configChanges="orientation|keyboardHidden|screenSize"                android:excludeFromRecents="true">            <intent-filter>                <action android:name="android.intent.action.MAIN" />                <action android:name="android.settings.WIFI_SETTINGS" />                <category android:name="android.intent.category.DEFAULT" />                <category android:name="android.intent.category.VOICE_LAUNCH" />                <category android:name="com.android.settings.SHORTCUT" />            </intent-filter>            <meta-data android:name="com.android.settings.FRAGMENT_CLASS"                android:value="com.android.settings.wifi.WifiSettings" />            <meta-data android:name="com.android.settings.TOP_LEVEL_HEADER_ID"                android:resource="@id/wifi_settings" />        </activity>

在应用中，可以直接调用：

startActivity(new Intent(android.provider.Settings.ACTION_WIFI_SETTINGS));

但是并不是所有的设置界面都可以直接调用，比如说恢复出厂设置的二级界面（packages/apps/Settings/src/com/android/settings/MasterClear.java）。

通过“android.settings.BACKUP_AND_RESET_SETTINGS”调用的只是“备份和重置”一级界面，并不是我需要的恢复出厂。

不过有源码就是任性，完全可以自己开放一个隐性Intent出来，步骤如下：

1.将MasterClear的集成类由Fragment更改为SettingsPreferenceFragment：

--- a/packages/apps/Settings/src/com/android/settings/MasterClear.java+++ b/packages/apps/Settings/src/com/android/settings/MasterClear.java@@ -44,6 +44,7 @@ import android.widget.CheckBox; import android.widget.LinearLayout; import android.widget.TextView; +import com.android.settings.SettingsPreferenceFragment; import com.android.settings.Utils; import com.mediatek.settings.ext.IFactoryExt; import com.mediatek.xlog.Xlog;@@ -61,7 +62,7 @@ import java.util.Locale;  *  * This is the initial screen.  */-public class MasterClear extends Fragment {+public class MasterClear extends SettingsPreferenceFragment {     private static final String TAG = "MasterClear";      private static final int KEYGUARD_REQUEST = 55;

2.在Settings.java中添加MasterClearActivity，对应步骤1中的MasterClear:

--- a/packages/apps/Settings/src/com/android/settings/Settings.java+++ b/packages/apps/Settings/src/com/android/settings/Settings.java@@ -455,6 +455,7 @@ public class Settings extends PreferenceActivity+        MasterClear.class.getName() // add by zms     };      @Override@@ -1370,4 +1371,5 @@ public class Settings extends PreferenceActivity     public static class PrintSettingsActivity extends Settings { /* empty */ }     public static class PrintJobSettingsActivity extends Settings { /* empty */ }+    public static class MasterClearActivity extends Settings { /* empty */ } }

3.在AndroidManifest.xml中添加接口：

--- a/packages/apps/Settings/AndroidManifest.xml+++ b/packages/apps/Settings/AndroidManifest.xml@@ -1010,6 +1010,20 @@                android:resource="@id/privacy_settings" />         </activity> +               <activity android:name="Settings$MasterClearActivity"+                android:label="@string/master_clear_title"+                android:configChanges="orientation|keyboardHidden|screenSize|mcc|mnc"+                android:launchMode="singleTask"+                android:parentActivityName="Settings">+            <intent-filter>+                <action android:name="android.intent.action.MAIN" />+                <action android:name="android.settings.MASTER_CLEAR" />+                <category android:name="android.intent.category.DEFAULT" />+            </intent-filter>+                       <meta-data android:name="com.android.settings.FRAGMENT_CLASS"+                android:value="com.android.settings.MasterClear" />+        </activity>

Done！

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