Android 获取Launcher 启动列表
时间：2010-09-14 来源：飞翔的熊猫
先留着有时间再看
获取Launcher 启动列表
即 列出所有Launcher程序 通过PackageManager 来获取
[代码 步骤]
1. 定义内部类 LauncherItem 用于定义Application相关属性 比如：图标 名称 以及 ComponentName
Java代码
1 public class LauncherItem {
2
3 Drawable icon;
4
5 String name;
6
7 ComponentName component;
8
9 LauncherItem(Drawable d, String s,ComponentName cn){
10
11 icon = d;
12
13 name = s;
14
15 component = cn;
16
17 }
18
19 };
20
21 public class LauncherItem {
22
23 Drawable icon;
24
25 String name;
26
27 ComponentName component;
28
29 LauncherItem(Drawable d, String s,ComponentName cn){
30
31 icon = d;
32
33 name = s;
34
35 component = cn;
36
37 }
38
39 };
40
2. 定义List lvalue 用于存放查询结果
Java代码
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. 定义LauncherAdapter 并指定各个item显示样式
Java代码
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. 启动某个item 当单击时
Java代码
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 结果结果
- 列出所有application
- 单击Alarm Clock 的情形：
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