Android中PackageManager查询，安装，启动,读取meta等操作
查询手机上的所有app
首先建立一个Model
class ApplicationInfo {
CharSequence title;
Intent intent;
Drawable icon;
boolean filtered;
//启动app初始化设置方式一
final void setActivity(ComponentName className, int launchFlags) {
intent = new Intent(Intent.ACTION_MAIN);
intent.addCategory(Intent.CATEGORY_LAUNCHER);
intent.setComponent(className);
intent.setFlags(launchFlags);
}
//直接获得启动器，启动初始化方式二
final void setActivity(Context cxt,String packageName, int launchFlags) {
intent = cxt.getPackageManager().getLaunchIntentForPackage(packageName);
intent.setFlags(launchFlags);
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (!(o instanceof ApplicationInfo)) {
return false;
}
ApplicationInfo that = (ApplicationInfo) o;
return title.equals(that.title) &&
intent.getComponent().getClassName().equals(
that.intent.getComponent().getClassName());
}
@Override
public int hashCode() {
int result;
result = (title != null ? title.hashCode() : 0);
final String name = intent.getComponent().getClassName();
result = 31 * result + (name != null ? name.hashCode() : 0);
return result;
}
}
第一种方式： 又一次被网络给坑了，找到的代码只能查询到系统图的app，不能查询到全部pp，代码如下:
private void loadAppVerion1() {
PackageManager manager = getPackageManager();
Intent mainIntent = new Intent(Intent.ACTION_MAIN, null); //可能出现误差，因为Action任何Activity都可以相同
mainIntent.addCategory(Intent.CATEGORY_LAUNCHER);
final List<ResolveInfo> apps = manager.queryIntentActivities(mainIntent, 0);
Collections.sort(apps, new ResolveInfo.DisplayNameComparator(manager));
if (apps != null) {
final int count = apps.size();
if (mApplications == null) {
mApplications = new ArrayList<ApplicationInfo>(count);
}
mApplications.clear();
for (int i = 0; i < count; i++) {
ApplicationInfo application = new ApplicationInfo();
ResolveInfo info = apps.get(i);
application.title = info.loadLabel(manager);
application.setActivity(new ComponentName(
info.activityInfo.applicationInfo.packageName,
info.activityInfo.name),
Intent.FLAG_ACTIVITY_NEW_TASK
| Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED);
application.icon = info.activityInfo.loadIcon(manager);
mApplications.add(application);
}
}
}
第二种方式可获得所有的app（推荐）：
private void loadAppVerion2()
{
PackageManager packageManager = this.getPackageManager();
List<PackageInfo> packageInfoList = packageManager.getInstalledPackages(PackageManager.GET_ACTIVITIES);
if(packageInfoList!=null)
{
if (mApplications == null)
{
mApplications = new ArrayList<ApplicationInfo>();
}
mApplications.clear();
for (PackageInfo packageInfo : packageInfoList)
{
ApplicationInfo application = new ApplicationInfo();
if(android.os.Build.VERSION.SDK_INT>=9)
{
application.icon = packageInfo.applicationInfo.loadLogo(packageManager);
}else{
application.icon = packageInfo.applicationInfo.loadIcon(packageManager);
}
application.title = packageInfo.applicationInfo.loadLabel(packageManager);
String packageName = packageInfo.packageName;
application.setActivity(this, packageName,Intent.FLAG_ACTIVITY_NEW_TASK|Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED);
mApplications.add(application);
}
}
}
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
下面是关于app的安装
// 安装APK程序代码
private void openArcInStall(File file) {//传入app的下载路径构造的File文件即可
Intent intent = new Intent();
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.setAction(android.content.Intent.ACTION_VIEW);
intent.setDataAndType(Uri.fromFile(file),"application/vnd.android.package-archive");
startActivity(intent);
}
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
体验一下查询的功能吧
查找可以分享文本的app
/**
* 查询手机内所有支持分享的应用
* @param context
* @return
*/
public static List<ResolveInfo> getShareApps(Context context){
List<ResolveInfo> mApps = new ArrayList<ResolveInfo>();
Intent intent=new Intent(Intent.ACTION_SEND,null);
intent.addCategory(Intent.CATEGORY_DEFAULT);
intent.setType("text/plain");
PackageManager pManager = context.getPackageManager();
mApps = pManager.queryIntentActivities(intent,PackageManager.COMPONENT_ENABLED_STATE_DEFAULT);
return mApps;
}
查询最近打开过的应用（任务栈）
private void searchRecents()
{
final PackageManager manager = getPackageManager();
final ActivityManager tasksManager = (ActivityManager) getSystemService(ACTIVITY_SERVICE);
final List<ActivityManager.RecentTaskInfo> recentTasks = tasksManager.getRecentTasks(4, 0);
final int count = recentTasks.size();
final ArrayList<ApplicationInfo> recents = new ArrayList<ApplicationInfo>();
}
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
读取Meta信息
1> application
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<meta-data
android:name="application_meta_data"
android:value="application_meta_data_value" /> <!--可以关联资源ID, 支持多种数据类型 -->
ApplicationInfo info = null;
try {
info = getPackageManager()
.getApplicationInfo(getPackageName(), PackageManager.GET_META_DATA);
} catch (NameNotFoundException e) {
e.printStackTrace();
}
Log.v(TAG, "application meta data value:" + info.metaData.getString("application_meta_data"));
2> Activity
<activity
android:name="fyc.app.testandroid.MainActivity" >
<meta-data
android:name="activity_meta_data"
android:value="activity_meta_data_value" />
</activity>
ActivityInfo info = null;
try {
info = getPackageManager()
.getActivityInfo(getComponentName(), PackageManager.GET_META_DATA);
} catch (NameNotFoundException e) {
e.printStackTrace();
}
Log.v(TAG, "activity meta data value:" + info.metaData.getString("activity_meta_data"));
3> Service
<service android:name="fyc.app.testandroid.MyService" >
<meta-data
android:name="service_meta_data"
android:value="service_meta_data_value" />
</service>
ServiceInfo info = null;
try {
info = getPackageManager()
.getServiceInfo(new ComponentName(this, MyService.class), PackageManager.GET_META_DATA);
} catch (NameNotFoundException e) {
e.printStackTrace();
}
Log.v(TAG, "service meta data value:" + info.metaData.getString("service_meta_data"));
4> BroadcastReceiver
<receiver android:name="fyc.app.testandroid.MyReceiver" >
<meta-data
android:name="receiver_meta_data"
android:value="receiver_meta_data_value" />
</receiver>
ActivityInfo info = null;
try {
info = getPackageManager()
.getReceiverInfo(new ComponentName(this, MyReceiver.class), PackageManager.GET_META_DATA);
} catch (NameNotFoundException e) {
e.printStackTrace();
}
Log.v(TAG, "receiver meta data value:" + info.metaData.getString("receiver_meta_data"));