android 9 預裝可卸載的app，只安裝一次

之前修改代碼做了可卸載的預裝app，但客戶要求，只安裝一次，後面就不管了，卸載了也不需要再次安裝。

需求的節點在於，預裝後apk文件還存在，重新啓動後會再次安裝。

解決的思路：

系統啓動後檢查是否已經安裝了app，同時檢查apk文件是否存在，如果滿足條件，刪之。

1、預裝可卸載的app

https://blog.csdn.net/cau_eric/article/details/104004350

2、啓動後監聽 ACTION_BOOT_COMPLETED 廣播

https://blog.csdn.net/cau_eric/article/details/89393779 

 我在源碼中找了，setting裏面有這種receiver，

a、修改 

\packages\apps\Settings\AndroidManifest.xml

添加：

<receiver android:name=".fuelgauge.batterytip.Mile8Receiver">
    <intent-filter android:priority="1000">
         <action android:name="android.intent.action.BOOT_COMPLETED"/>
    </intent-filter>
</receiver>

b、增加Receiver 文件：

public class Mile8Receiver extends BroadcastReceiver {
    private static final String TAG = "Mile8Receiver";
	private final String apk_1 = "/vendor/priv-app/acquisitor_app-release-3.4.0.10-V69.apk";
    private final String apk_2 = "/vendor/priv-app/com.google.android.inputmethod.pinyin.apk";
    private final String apk_3 = "/vendor/priv-app/ES_File_Explorer.apk";
	private final String packageName_1 = "com.nl.android.ecgviewer";
    private final String packageName_2 = "com.google.android.inputmethod.pinyin";
    private final String packageName_3 = "com.estrongs.android.pop";
	private List<String> packages;

    
    @Override
    public void onReceive(Context context, Intent intent) {
        if (Intent.ACTION_BOOT_COMPLETED.equals(intent.getAction())) {
            Log.d(TAG,"=Mile8Receiver=>>ACTION_BOOT_COMPLETED");			
			execSuCmd("mount -o remount -w /vendor");
			packages = getNullSystemPackageNames(context);
			if (isFileExist(apk_1) && isPackageInstalled(packageName_1)){
            	Log.d(TAG,"=Mile8Receiver=apk1=>>");
				execSuCmd("rm -f " + apk_1);
        	}
			if (isFileExist(apk_2) && isPackageInstalled(packageName_2)){
            	Log.d(TAG,"=Mile8Receiver=apk2=>>");
				execSuCmd("rm -f " + apk_2);
        	}
			if (isFileExist(apk_3) && isPackageInstalled(packageName_3)){
            	Log.d(TAG,"=Mile8Receiver=apk3=>>");
				execSuCmd("rm -f " + apk_3);
        	}
		
        }
    }
...
}

 c、檢查app是否已安裝：

private boolean isPackageInstalled(String packageName_input){
        for (String packageName : packages){
            if (packageName.equals(packageName_input)){
                return true;
            }
        }
        return false;
    }

獲取第三方應用： https://blog.csdn.net/cau_eric/article/details/100572601

d、檢查apk文件是否存在：

private boolean isFileExist(String file){
        return (new File(file)).exists();
    }

基本完工了，但是還有一個問題，刪除文件的時候提示read-only file system錯誤。

解決辦法：https://blog.csdn.net/cau_eric/article/details/104757888

e、su系統執行命令：

https://blog.csdn.net/cau_eric/article/details/98969975

 

OK！測試通過