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本篇文章为大家展示了Android7.0中怎么使用 MTK设置默认桌面，内容简明扼要并且容易理解，绝对能使你眼前一亮，通过这篇文章的详细介绍希望你能有所收获。
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1.找到安装应用的文件
frameworks\base\services\core\java\com\android\server\pm\PackageManagerService.java
try {
PackageParser.Package newPackage = scanPackageTracedLI(pkg, policyFlags, scanFlags,
System.currentTimeMillis(), user);
updateSettingsLI(newPackage, installerPackageName, null, res, user);
if (res.returnCode == PackageManager.INSTALL_SUCCEEDED) {
prepareAppDataAfterInstallLIF(newPackage);
Log.d("yh", "pkgName " +pkgName);
// 由于客户的应用保密 这里使用点心桌面的包名---com.dianxinos.dxhome
if (pkgName.equals("com.dianxinos.dxhome")){
//发送广播
Intent intent = new Intent("android.intent.action.UPDATE_LANUCHER_APPS");
mContext.sendBroadcast(intent);
}
//------------------------
} else {
// Remove package from internal structures, but keep around any
// data that might have already existed
deletePackageLIF(pkgName, UserHandle.ALL, false, null,
PackageManager.DELETE_KEEP_DATA, res.removedInfo, true, null);
}
} catch (PackageManagerException e) {
res.setError("Package couldn't be installed in " + pkg.codePath, e);
}
Trace.traceEnd(TRACE_TAG_PACKAGE_MANAGER);
}2.由于设置默认桌面时，是在Settings中设置的所以广播接收者在settings中添加并设置默认桌面（添加文件–packages\apps\Settings\src\com\android\settings下—UpdateLanucherReceiver.java）
package com.android.settings;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.ComponentName;
import android.content.IntentFilter;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import java.util.ArrayList;
import android.util.Log;
import android.content.pm.ActivityInfo;
import java.util.List;
public class UpdateLanucherReceiver extends BroadcastReceiver {
public UpdateLanucherReceiver() {
}
@Override
public void onReceive(Context context, Intent intent) {
if (intent.getAction().equals("android.intent.action.UPDATE_LANUCHER_APPS")) {
Log.e("yhyh" ," onReceive");
final PackageManager mPm = context.getPackageManager();
// 点心桌面的包名类名 com.dianxinos.dxhome / com.nd.hilauncherdev.launcher.Launcher设置默认桌面
ComponentName DefaultLauncher=new ComponentName(" com.dianxinos.dxhome",
"com.nd.hilauncherdev.launcher.Launcher");
ArrayList homeActivities = new ArrayList();
ComponentName currentDefaultHome = mPm.getHomeActivities(homeActivities);
ComponentName[]mHomeComponentSet = new ComponentName[homeActivities.size()];
for (int i = 0; i < homeActivities.size(); i++) {
final ResolveInfo candidate = homeActivities.get(i);
Log.e("yhyh","homeActivitie: candidate = "+candidate);
final ActivityInfo activityInfo= candidate.activityInfo;
ComponentName activityName = new ComponentName(activityInfo.packageName, activityInfo.name);
mHomeComponentSet[i] = activityName;
}
IntentFilter mHomeFilter = new IntentFilter(Intent.ACTION_MAIN);
mHomeFilter.addCategory(Intent.CATEGORY_HOME);
mHomeFilter.addCategory(Intent.CATEGORY_DEFAULT);
ListActivities=new ArrayList();
mPm.replacePreferredActivity(mHomeFilter, IntentFilter.MATCH_CATEGORY_EMPTY,mHomeComponentSet, DefaultLauncher);
//刷新桌面
Intent intent2 = new Intent(Intent.ACTION_MAIN);
intent2.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent2.addCategory(Intent.CATEGORY_HOME);
context.startActivity(intent2);
}
}
} 3.packages\apps\Settings\AndroidManifest.xml