Android Studio 应用程序管理功能思路与代码

程序管理功能：

点击按钮进入程序管理页面，在onCreate方法中绑定app_manager界面，因为该页面内有ListView，所以还需要一个app_item页面进行设置列表，因为点击列表对象需要弹出自定义卸载、打开、分享按钮的对话框，所以还要一个popup_window，layout所以总共需要三个。分别如下

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent" android:layout_height="match_parent">

<TextView android:id="@+id/tv_title"
style="@style/text_title_style"
android:text="所  有  程  序"
android:layout_alignParentTop="true"
android:layout_alignParentStart="true"
android:layout_marginTop="17dp" />

<View style="@style/view_divide_line_style"
android:layout_alignBottom="@id/tv_title"
android:layout_alignParentStart="true" />

<FrameLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_below="@+id/tv_title"
android:layout_alignParentStart="true"
android:layout_marginTop="15dp">

<ListView
android:id="@+id/lv_appmanage"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:cacheColorHint="#00000000"
android:divider="#fff"
android:fastScrollEnabled="true"
android:dividerHeight="1.0dip"
android:paddingLeft="3.0dip"
android:paddingRight="3.0dip" />

<RelativeLayout
android:id="@+id/rl_loading"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >

<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
android:layout_centerInParent="true">

<ProgressBar
android:id="@+id/pb"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
/>

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="10dip"
android:text="正在加载应用程序。。"
android:textColor="#fff"
android:textSize="22sp" />
</LinearLayout>
</RelativeLayout>
</FrameLayout>
</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:paddingBottom="8.0dip"
android:paddingLeft="6.0dip"
android:paddingRight="5.0dip"
android:paddingTop="8.0dip" >

<ImageView
android:id="@+id/iv_appicon"
android:layout_width="45dip"
android:layout_height="45dip"
android:layout_centerVertical="true"
android:src="@mipmap/ic_launcher" />

<
4000
span class="hljs-tag"><TextView
android:id="@+id/tv_appname"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_marginLeft="4.0dip"
android:layout_toRightOf="@id/iv_appicon"
android:textColor="#fff"
android:text="程序名称"
android:textSize="16.0dip" />

<TextView
android:id="@+id/tv_appversion"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:layout_marginLeft="4.0dip"
android:textColor="#fff"
android:layout_marginRight="10dp"
android:text="1.0"
android:textSize="16.0dip" />

</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:id="@+id/ll_popup_window"
android:layout_height="wrap_content"
android:background="@drawable/local_popup_bg"
android:orientation="horizontal">

<LinearLayout android:id="@+id/ll_uninstall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="15dip"
android:layout_marginRight="15dip"
android:layout_gravity="center_vertical"
android:orientation="vertical" >

<ImageView
android:layout_width="35dip"
android:layout_height="35dip"
android:src="@drawable/img1" />

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="卸载"
android:layout_gravity="center"
android:textColor="#fff"
android:textSize="12sp" />
</LinearLayout>

<View
android:layout_width="1dip"
android:layout_height="fill_parent"
android:background="@drawable/local_popup_divider" />

<LinearLayout android:id="@+id/ll_start"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_marginLeft="15dip"
android:layout_marginRight="15dip"
android:orientation="vertical" >

<ImageView
android:layout_width="35dip"
android:layout_height="35dip"
android:src="@drawable/img2" />

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="启动"
android:layout_gravity="center"
android:textColor="#fff"
android:textSize="12sp" />
</LinearLayout>

<View
android:layout_width="1dip"
android:layout_height="fill_parent"
android:background="@drawable/local_popup_divider" />

<LinearLayout android:id="@+id/ll_share"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_marginLeft="15dip"
android:layout_marginRight="15dip"
android:orientation="vertical" >

<ImageView
android:layout_width="35dip"
android:layout_height="35dip"
android:src="@drawable/img3" />

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="分享"
android:layout_gravity="center"
android:textColor="#fff"
android:textSize="12sp" />
</LinearLayout>

</LinearLayout>

接下里由于需要每个应用程序的各个数据对象，所以需要一个AppInfo类

public class AppInfo {
private Drawable app_icon;
private String app_name;
private String app_version;
private String packagename;
private boolean isUserApp;

public AppInfo() {
super();
// TODO Auto-generated constructor stub
}
public AppInfo(Drawable app_icon, String app_name, String app_version,
String packagename) {
super();
this.app_icon = app_icon;
this.app_name = app_name;
this.app_version = app_version;
this.packagename = packagename;
}

public AppInfo(Drawable app_icon, String app_name, String app_version,String packagename, boolean isUserApp) {
super();
this.app_icon = app_icon;
this.app_name = app_name;
this.app_version = app_version;
this.packagename = packagename;
this.isUserApp = isUserApp;
}
public Drawable getApp_icon() {
return app_icon;
}
public void setApp_icon(Drawable app_icon) {
this.app_icon = app_icon;
}
public String getApp_name() {
return app_name;
}
public void setApp_name(String app_name) {
this.app_name = app_name;
}
public String getApp_version() {
return app_version;
}
public void setApp_version(String app_version){
this.app_version = app_version;
}
public String getPackagename() {
return packagename;
}
public void setPackagename(String packagename) {
this.packagename = packagename;
}

public boolean isUserApp() {
return isUserApp;
}
public void setUserApp(boolean isUserApp) {
this.isUserApp = isUserApp;
}

@Override
public String toString() {
return "AppInfo [app_icon=" + app_icon + ", app_name=" + app_name+ ", app_version=" + app_version + ", packagename="+ packagename + ", isUserApp=" + isUserApp + "]";
}
}

因为是ListView，所以需要一个适配器来绑定列表内容

public class AppManageAdapter extends BaseAdapter {

private Context context;
private LayoutInflater mInflater;
private List<AppInfo> appInfos;

public void setAppInfos(List<AppInfo> appInfos) {
this.appInfos = appInfos;
}

public AppManageAdapter(Context context, List<AppInfo> appInfos){
this.context = con
e626
text;
this.appInfos = appInfos;
mInflater = LayoutInflater.from(context);
}

@Override
public int getCount() {
return appInfos.size();
}

@Override
public Object getItem(int position) {
return appInfos.get(position);
}

@Override
public long getItemId(int position) {
return position;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
/*
* 1.得到控件
* 2.得到数据
* 3.绑定数据
* */

View view = null;
if (convertView != null){
view = convertView;
}else{
view = mInflater.inflate(R.layout.app__item,null);
}

ImageView iv_appicon = (ImageView) view.findViewById(R.id.iv_appicon);
TextView tv_appname = (TextView) view.findViewById(R.id.tv_appname);
TextView tv_appversion = (TextView) view.findViewById(R.id.tv_appversion);

AppInfo appInfo = appInfos.get(position);
iv_appicon.setImageDrawable(appInfo.getApp_icon());
tv_appname.setText(appInfo.getApp_name());
tv_appversion.setText(appInfo.getApp_version());

return view;
}
}

接下来就是AppManager里面的工作了，在onCreate方法中调用initData方法来进行列表加载更新，当没有加载出来时，中心显示进度条和正在加载，之后定义一个线程，生成一个AppInfo类型的泛型集合AppInfos，再写一个AppInfoService类，里面专门写获取应用程序信息和给AppInfos填充数据的方法，由于我们有个功能是点击标题更换程序类型显示，所以在该类中再写一个方法用来判断是否是用户程序。这时候在线程中就可以去分类用户程序和系统程序了。接下来就是判断程序信息是否加载完成了，所以用到了Handler，然后在handleMessage中判断接收到的信息，当加载完成时隐藏进度条和中心文字，这时显示事件基本完成，剩下的就是点击反馈内容了，类来继承OnItemClickListener，重写onItemClickfangfa，点击显示自定义对话框，通过ScaleAnimation类添加动画，然后给卸载、启动、分享三个按钮绑定监听器，进行点击反馈。下面就是服务类和主页面类

public class AppInfoService {
private Context context;
private PackageManager packageManager;

public AppInfoService(Context context){
this.context = context;
packageManager = context.getPackageManager();
}

//得到所有的应用程序
public List<AppInfo> getAppInfos(){
List<AppInfo> appInfos = new ArrayList<AppInfo>();
List<ApplicationInfo> applicationInfos = packageManager.getInstalledApplications(PackageManager.GET_UNINSTALLED_PACKAGES);
for(ApplicationInfo info:applicationInfos){
AppInfo appInfo = new AppInfo();

Drawable app_icon = info.loadIcon(packageManager);
appInfo.setApp_icon(app_icon);

String app_name = info.loadLabel(packageManager).toString();
appInfo.setApp_name(app_name);

String packageName = info.packageName;
appInfo.setPackagename(packageName);
try {
PackageInfo packageInfo = packageManager.getPackageInfo(packageName,0);
String app_version = packageInfo.versionName;
appInfo.setApp_version(app_version);
} catch (Exception e) {
e.printStackTrace();
}
boolean isUserApp = filterApp(info);
appInfo.setUserApp(isUserApp);
appInfos.add(appInfo);

}
return  appInfos;
}
//判断应用程序是否是用户程序
public boolean filterApp(ApplicationInfo info) {
//原来是系统应用，用户手动升级
if ((info.flags & ApplicationInfo.FLAG_UPDATED_SYSTEM_APP) != 0) {
return true;
//用户自己安装的应用程序
} else if ((info.flags & ApplicationInfo.FLAG_SYSTEM) == 0) {
return true;
}
return false;
}
}

public class AppManager extends Activity implements View.OnClickListener {

protected static final int SUCCESS_GET_APPLICATION = 0;

private RelativeLayout rl_loading;
private ListView lv_appmanage;
private PackageManager packageManager;
private AppInfoService appInfoService;
private List<AppInfo> appInfos;
private List<AppInfo> userAppInfos;
private boolean isAllApp = true;
private AppManageAdapter mAdapter;
private TextView tv_title;

private PopupWindow mPopupWindow;

private Handler mHandler = new Handler(){
@Override
public void handleMessage(Message msg) {
switch (msg.what){
case SUCCESS_GET_APPLICATION:
if(mAdapter != null){
if(isAllApp){
mAdapter.setAppInfos(appInfos);
}else{
mAdapter.setAppInfos(userAppInfos);
}
mAdapter.notifyDataSetChanged();
rl_loading.setVisibility(View.GONE);
}else{
//给Listview绑定数据，隐藏加载的进度条
mAdapter = new AppManageAdapter(getApplicationContext(),appInfos);
lv_appmanage.setAdapter(mAdapter);
/*setVisibility方法中可以放置三个参数
1.View.GONE控件消失不占控件
2.View.INVISIBLE 控件消失占据空间
3.View.VISIBLE控件显示*/
rl_loading.setVisibility(View.GONE);
}

break;

default:
break;
}
}
};

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.app_manager);
rl_loading = (RelativeLayout) findViewById(R.id.rl_loading);
lv_appmanage = (ListView) findViewById(R.id.lv_appmanage);
tv_title = (TextView) findViewById(R.id.tv_title);
tv_title.setOnClickListener(this);

appInfoService = new AppInfoService(this);
//得到包管理器
packageManager = getPackageManager();

initData();

//给ListView绑定项目点击监听器
lv_appmanage.setOnItemClickListener(new MyOnItemClickListener());
}

private void initData(){
rl_loading.setVisibility(View.VISIBLE);
new Thread(){
public void run() {
appInfos = appInfoService.getAppInfos();

userAppInfos = new ArrayList<AppInfo>();
for(AppInfo appInfo:appInfos){
if(appInfo.isUserApp()){
userAppInfos.add(appInfo);
}
}
Message msg = new Message();
msg.what = SUCCESS_GET_APPLICATION;
mHandler.sendMessage(msg);
};
}.start();

}

private final class MyOnItemClickListener implements AdapterView.OnItemClickListener{
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
View contentView = View.inflate(getApplicationContext(), R.layout.popup_window, null);
LinearLayout ll_uninstall = (LinearLayout) contentView.findViewById(R.id.ll_uninstall);
LinearLayout ll_start = (LinearLayout) contentView.findViewById(R.id.ll_start);
LinearLayout ll_share = (LinearLayout) contentView.findViewById(R.id.ll_share);

LinearLayout ll_popup_window = (LinearLayout) contentView.findViewById(R.id.ll_popup_window);

//动画效果，前四个数据是设置对话框大小，后四个数据设置动画样式
ScaleAnimation animation = new ScaleAnimation(0, 1.0f, 0, 1.0f, Animation.RELATIVE_TO_SELF, 0, Animation.RELATIVE_TO_SELF, 0.5f);
animation.setDuration(200);
ll_popup_window.startAnimation(animation);

MyOnClickListener l = new MyOnClickListener(position);
ll_uninstall.setOnClickListener(l);
ll_start.setOnClickListener(l);
ll_share.setOnClickListener(l);

mPopupWindow = new PopupWindow(contentView, ViewGroup.LayoutParams.WRAP_CONTENT, DensityUtil.px2dip(getApplicationContext(),68));
int[] arrayOfInt = new int[2];
view.getLocationInWindow(arrayOfInt);
int x = arrayOfInt[0] +  DensityUtil.px2dip(getApplicationContext(), 150);
int y = arrayOfInt[1];

//1 指定popupwindow的背景   2 popupwindow能够获得焦点
mPopupWindow.setBackgroundDrawable(new BitmapDrawable());
mPopupWindow.setFocusable(true);
mPopupWindow.showAtLocation(view, Gravity.LEFT|Gravity.TOP, x, y);
}
}
private final class MyOnClickListener implements View.OnClickListener {

private int position;

public MyOnClickListener(int position) {

this.position = position;
}

public void onClick(View v) {

AppInfo appInfo = (AppInfo) mAdapter.getItem(position);
String packageName = appInfo.getPackagename();
int id = v.getId();
switch (id) {
case R.id.ll_uninstall:
//系统应用不能被卸载
if(!appInfo.isUserApp()){
Toast.makeText(getApplicationContext(), "系统应用不能被卸载", Toast.LENGTH_SHORT).show();
}else{
//自身不能被卸载
if(packageName.equals(getPackageName())){
Toast.makeText(getApplicationContext(), "自身应用不能被卸载", Toast.LENGTH_SHORT).show();
}else{
Intent uninstall_intent = new Intent();
uninstall_intent.setAction(Intent.ACTION_DELETE);
uninstall_intent.setData(Uri.parse("package:" + packageName));
//startActivity(uninstall_intent);
startActivityForResult(uninstall_intent, 100);
}
}
break;
case R.id.ll_start:
try {
PackageInfo packgeInfo = packageManager.getPackageInfo(packageName, PackageManager.GET_ACTIVITIES);
ActivityInfo[] activites = packgeInfo.activities;
if(activites == null || activites.length == 0){
Toast.makeText(getApplicationContext(), "该应用程序不能被启动", Toast.LENGTH_SHORT).show();
}else{
ActivityInfo activityInfo = activites[0];
String name = activityInfo.name;
ComponentName component = new ComponentName(packageName, name);
Intent start_intent = new Intent();
start_intent.setComponent(component);
startActivity(start_intent);
}
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
Toast.makeText(getApplicationContext(), "该应用程序不能被启动", Toast.LENGTH_SHORT).show();
}
break;
case R.id.ll_share:
Intent share_intent = new Intent();
share_intent.setAction(Intent.ACTION_SEND);
share_intent.setType("text/plain");
share_intent.putExtra(Intent.EXTRA_SUBJECT, "f分享");
share_intent.putExtra(Intent.EXTRA_TEXT, "HI 推荐您使用一款软件：" + appInfo.getApp_name());
share_intent = Intent.createChooser(share_intent, "分享");
startActivity(share_intent);
break;

default:
break;
}
mPopupWindow.dismiss();
}

}

//因为卸载完反馈的是100，所以用此方法来进行列表更新
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// TODO Auto-generated method stub
super.onActivityResult(requestCode, resultCode, data);
if(requestCode == 100){
initData();
}
}

@Override
public void onClick(View v) {
int id = v.getId();
switch(id){
case R.id.tv_title:
if (isAllApp){
mAdapter.setAppInfos(userAppInfos);
mAdapter.notifyDataSetChanged();
tv_title.setText("用  户  程  序");
isAllApp = false;
}else {
mAdapter.setAppInfos(appInfos);
mAdapter.notifyDataSetChanged();
tv_title.setText("所  有  程  序");
isAllApp = true;
}
break;
default:

break;
}
}
}

最后不要忘了在AndroidMainifest中进行注册。