android 修改默认Launcher

最新推荐文章于 2024-09-12 19:47:37 发布

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本文探讨了Android系统中Launcher的启动流程及如何通过修改代码来指定特定的Launcher为默认启动项。涉及修改源码中的Intent过滤器及在无源码情况下进行相应配置。

系统启动后, 会查找并运行Launcher,

有源码的情况下,可以通过修改Intent-filter中的android:priorty="N" N >=1; 一般我会设置 N=100;

没有源码的情况下, 要将第三方Launcher默认启动, 则需要在些过程做点修改.

frameworks/base/services/java/com/android/server/am/ActivityManagerService.java

    boolean startHomeActivityLocked(int userId) {
        if (mHeadless) {
            // Added because none of the other calls to ensureBootCompleted seem to fire
            // when running headless.
            ensureBootCompleted();
            return false;
        }

        if (mFactoryTest == SystemServer.FACTORY_TEST_LOW_LEVEL
                && mTopAction == null) {
            // We are running in factory test mode, but unable to find
            // the factory test app, so just sit around displaying the
            // error message and don't try to start anything.
            return false;
        }
        Intent intent = new Intent(
            mTopAction,
            mTopData != null ? Uri.parse(mTopData) : null);
        intent.setComponent(mTopComponent);
        if (mFactoryTest != SystemServer.FACTORY_TEST_LOW_LEVEL) {
            intent.addCategory(Intent.CATEGORY_HOME);
        }
   /** AnsonCode 2013.8.5 add Code**/
		try{
			final String specialPkg = "com.android.launcherX";
			mContext.getPackageManager().getApplicationEnabledSetting(specialPkg);
			intent.setPackage(specialPkg);
		}catch(Exception e){
			e.printStackTrace();
		}
   /** AnsonCode End **/
        ActivityInfo aInfo =
            resolveActivityInfo(intent, STOCK_PM_FLAGS, userId);
        if (aInfo != null) {
            intent.setComponent(new ComponentName(
                    aInfo.applicationInfo.packageName, aInfo.name));
            // Don't do this if the home app is currently being
            // instrumented.
            aInfo = new ActivityInfo(aInfo);
            aInfo.applicationInfo = getAppInfoForUser(aInfo.applicationInfo, userId);
            ProcessRecord app = getProcessRecordLocked(aInfo.processName,
                    aInfo.applicationInfo.uid);
            if (app == null || app.instrumentationClass == null) {
                intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK);
                mMainStack.startActivityLocked(null, intent, null, aInfo,
                        null, null, 0, 0, 0, 0, null, false, null);
            }
        }

        return true;
    }