獲取Launcher 啟動列表

獲取Launcher 啟動列表

即 列出所有Launcher程序 通過PackageManager 來獲取

[代碼 步驟]

1. 定義內部類 LauncherItem 用於定義Application相關屬性 比如：圖標 名稱 以及 ComponentName

Java代碼

public class LauncherItem {

Drawable icon;

String name;

ComponentName component;

LauncherItem(Drawable d, String s,ComponentName cn){

icon = d;

name = s;

component = cn;

}

};

public class LauncherItem {

Drawable icon;

String name;

ComponentName component;

LauncherItem(Drawable d, String s,ComponentName cn){

icon = d;

name = s;

component = cn;

}

};

2. 定義List lvalue 用於存放查詢結果

Java代碼

public void addLauncher(){

lvalue = new ArrayList();

pkgMgt = this.getPackageManager();

//to query all launcher & load into List<>

Intent it = new Intent(Intent.ACTION_MAIN);

it.addCategory(Intent.CATEGORY_LAUNCHER);

List ra =pkgMgt.queryIntentActivitIEs(it,0);

for(int i=0;i< p>

ActivityInfo ai = ra.get(i).activityInfo;

//String ainfo = ai.toString();

Drawable icon = ai.loadIcon(pkgMgt);

String label = ai.loadLabel(pkgMgt).toString();

ComponentName c = new ComponentName(ai.applicationInfo.packageName,ai.name);

LauncherItem item = new LauncherItem(icon,label,c);

lvalue.add(item);

}

}

public void addLauncher(){

lvalue = new ArrayList();

pkgMgt = this.getPackageManager();

//to query all launcher & load into List<>

Intent it = new Intent(Intent.ACTION_MAIN);

it.addCategory(Intent.CATEGORY_LAUNCHER);

List ra =pkgMgt.queryIntentActivitIEs(it,0);

for(int i=0;i< p>

ActivityInfo ai = ra.get(i).activityInfo;

//String ainfo = ai.toString();

Drawable icon = ai.loadIcon(pkgMgt);

String label = ai.loadLabel(pkgMgt).toString();

ComponentName c = new ComponentName(ai.applicationInfo.packageName,ai.name);

LauncherItem item = new LauncherItem(icon,label,c);

lvalue.add(item);

}

}

3. 定義LauncherAdapter 並指定各個item顯示樣式

Java代碼

public class LauncherAdapter extends BaseAdapter {

Activity activity;

public LauncherAdapter(Activity a){

activity = a;

}

@Override

public int getCount() {

// TODO Auto-generated method stub

return lvalue.size();

}

@Override

public Object getItem(int arg0) {

// TODO Auto-generated method stub

return arg0;

}

@Override

public long getItemId(int position) {

// TODO Auto-generated method stub

return position;

}

@Override

public View getView(int position, View convertView, VIEwGroup parent) {

// TODO Auto-generated method stub

return composeItem(position);

}

public VIEw composeItem(int position){

LinearLayout layout = new LinearLayout(activity);

layout.setOrIEntation(LinearLayout.HORIZONTAL);

ImageView iv = new ImageVIEw(activity);

iv.setImageDrawable(lvalue.get(position).icon);

layout.addVIEw(iv);

TextView tv = new TextVIEw(activity);

tv.setText(lvalue.get(position).name);

tv.setPadding(10, 5, 0, 0);

layout.addVIEw(tv);

return layout;

}

}

public class LauncherAdapter extends BaseAdapter {

Activity activity;

public LauncherAdapter(Activity a){

activity = a;

}

@Override

public int getCount() {

// TODO Auto-generated method stub

return lvalue.size();

}

@Override

public Object getItem(int arg0) {

// TODO Auto-generated method stub

return arg0;

}

@Override

public long getItemId(int position) {

// TODO Auto-generated method stub

return position;

}

@Override

public View getView(int position, View convertView, VIEwGroup parent) {

// TODO Auto-generated method stub

return composeItem(position);

}

public VIEw composeItem(int position){

LinearLayout layout = new LinearLayout(activity);

layout.setOrIEntation(LinearLayout.HORIZONTAL);

ImageView iv = new ImageVIEw(activity);

iv.setImageDrawable(lvalue.get(position).icon);

layout.addVIEw(iv);

TextView tv = new TextVIEw(activity);

tv.setText(lvalue.get(position).name);

tv.setPadding(10, 5, 0, 0);

layout.addVIEw(tv);

return layout;

}

}

4. 啟動某個item 當單擊時

Java代碼

adapter = new LauncherAdapter(this);

lv.setAdapter(adapter);

lv.setOnItemClickListener(new OnItemClickListener(){

@Override

public void onItemClick(AdapterView arg0, VIEw arg1, int arg2,

long arg3) {

// TODO Auto-generated method stub

Intent intent =new Intent(Intent.ACTION_VIEW);

intent.setComponent(lvalue.get(arg2).component);

startActivity(intent);

}

});

adapter = new LauncherAdapter(this);

lv.setAdapter(adapter);

lv.setOnItemClickListener(new OnItemClickListener(){

@Override

public void onItemClick(AdapterView arg0, VIEw arg1, int arg2,

long arg3) {

// TODO Auto-generated method stub

Intent intent =new Intent(Intent.ACTION_VIEW);

intent.setComponent(lvalue.get(arg2).component);

startActivity(intent);

}

});

5. emulator 結果結果

- 列出所有application

- 單擊Alarm Clock 的情形：