Android 设置默认Launcher，基于h5框架的移动app开发

Android 设置默认Launcher，基于h5框架的移动app开发

if (resolveInfoList != null) {

int size = resolveInfoList.size();

for (int j = 0; j < size;) {

final ResolveInfo r = resolveInfoList.get(j);

if (!r.activityInfo.packageName.equals(examplePackageName)) {

resolveInfoList.remove(j);

size -= 1;

} else {

j++;

}

}

ComponentName[] set = new ComponentName[size];

ComponentName defaultLauncher = new ComponentName(

examplePackageName, exampleActivityName);

int defaultMatch = 0;

for (int i = 0; i < size; i++) {

final ResolveInfo resolveInfo = resolveInfoList.get(i);

set[i] = new ComponentName(

resolveInfo.activityInfo.packageName,

resolveInfo.activityInfo.name);

if (defaultLauncher.getClassName().equals(

resolveInfo.activityInfo.name)) {

defaultMatch = resolveInfo.match;

}

}

IntentFilter filter = new IntentFilter();

filter.addAction(Intent.ACTION_MAIN);

filter.addCategory(Intent.CATEGORY_HOME);

filter.addCategory(Intent.CATEGORY_DEFAULT);

addPreferredActivity2(filter, defaultMatch, set,

defaultLauncher);

}

}

// TChip ZJ Add Above for Default Launcher

2.添加以下函数：

public void addPreferredActivity2(IntentFilter filter, int match,

ComponentName[] set, ComponentName activity) {

Log.d(“debug_default”, “addPreferredActivity2 is called.”);

// writer

synchronized (mPackages) {

Slog.i(TAG, "Adding preferred activity " + activity + “:”);

filter.dump(new LogPrinter(Log.INFO, TAG), " ");

mSettings.editPreferredActivitiesLPw(0).addFilter(

new PreferredActivity(filter, match, set, activity, true));

scheduleWriteSettingsLocked();

}

}

3.修改PackageManagerService.java的函数findPreferredActivity：

（1）对removeMatches进行条件判断，在launcher时不remove：

if (!(intent.getAction() != null

&& intent.getAction().equals(intent.ACTION_MAIN)

&& intent.getCategories() != null && intent.getCategories()

.contains(intent.CATEGORY_HOME))) {

Slog.d(TAG, “launcher”);

} else {

if (removeMatches) {

pir.removeFilter(pa);

if (DEBUG_PREFERRED) {

Slog.v(TAG, "Removing match " + pa.mPref.mComponent);

}

break;

}

}

（2）

if (always && !pa.mPref.sameSet(query, priority)) {

Slog.i(TAG, "Result set changed, dropping preferred activity for "

intent + " type " + resolvedType);

if (DEBUG_PREFERRED) {

Slog.v(TAG, "Removing preferred activity since set changed "

pa.mPref.mComponent);

}

pir.removeFilter(pa);

// Re-add the filter as a “last chosen” entry (!always)

PreferredActivity lastChosen = new PreferredActivity(pa,

pa.mPref.mMatch, null, pa.mPref.mComponent, false);

pir.addFilter(lastChosen);

重要知识点

下面是有几位Android行业大佬对应上方技术点整理的一些进阶资料。

高级进阶篇——高级UI，自定义View（部分展示）

UI这块知识是现今使用者最多的。当年火爆一时的Android入门培训，学会这小块知识就能随便找到不错的工作了。不过很显然现在远远不够了，拒绝无休止的CV,亲自去项目实战，读源码，研究原理吧！

面试题部分合集

今使用者最多的。当年火爆一时的Android入门培训，学会这小块知识就能随便找到不错的工作了。不过很显然现在远远不够了，拒绝无休止的CV,亲自去项目实战，读源码，研究原理吧！

[外链图片转存中…(img-GhPfLLpS-1643522362688)]

面试题部分合集
[外链图片转存中…(img-OzGcpAEx-1643522362689)]

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