我正在试图弄清楚如何将此代码实现到我现有的源代码中。目前我有一些来源显示所有已安装应用程序的列表视图，点击后会向应用程序发送意图。我需要一些关于如何拉动图标并将其添加到列表视图中的支持。
任何帮助，源代码编辑，链接等都可以帮我解决这个问题。
谢谢
ListInstalledActivitiesActivity
public class ListInstalledActivitiesActivity extends ListActivity {
// Buffer used to store package and class information, and also determine the number of installed activities
private ArrayList<String[]> _activitiesBuffer = null;
// Buffers for package and class information
private String[] _packages = null;
private String[] _classes = null;
// Index used to fill buffers
private int _index = 0;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main3);
// Get all installed activities (package and class information for every activity)
getAllInstalledActivities();
// Set content to GUI
setListAdapter(new ArrayAdapter<String>(this, R.layout.list_item, _classes));
ListView lv = getListView();
lv.setTextFilterEnabled(true);
// Add listener
lv.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
// When clicked, show a toast with the selected activity
Toast.makeText(
getApplicationContext(),
((TextView) view).getText(),
Toast.LENGTH_SHORT).show();
// When clicked, start selected activity, if allowed or possible
try {
Intent intent = new Intent().setClassName(
_packages[position], // package
_classes[position]); // class
startActivity(intent);
} catch (Exception e) {
Toast.makeText(getApplicationContext(), "Unable to start selected application.", Toast.LENGTH_SHORT);
}
} // public void onItemClick(AdapterView<?> parent, View view, int position, long id)
});
} // public void onCreate(Bundle savedInstanceState)
/*
* Get all installed activities
*/
private void getAllInstalledActivities() {
// Initialize activities buffer
_activitiesBuffer = new ArrayList<String[]>();
final Intent intent = new Intent(Intent.ACTION_MAIN, null);
intent.addCategory(Intent.CATEGORY_LAUNCHER);
final List<ResolveInfo> pkgAppsList = getPackageManager().queryIntentActivities( intent, 0);
Iterator<ResolveInfo> iterator1 = pkgAppsList.iterator();
while (iterator1.hasNext()) {
ResolveInfo resolveInfo = iterator1.next();
String[] buf = new String[] {
resolveInfo.activityInfo.packageName,
resolveInfo.activityInfo.name};
_activitiesBuffer.add(buf);
} // while (iterator1.hasNext())
_packages = new String[_activitiesBuffer.size()];
_classes = new String[_activitiesBuffer.size()];
Iterator<String[]> iterator2 = _activitiesBuffer.iterator();
while (iterator2.hasNext()) {
String[] buf = iterator2.next();
// Store package information
_packages[_index] = buf[0];
// Store class information
_classes[_index] = buf[1];
_index++;
} // while (iterator2.hasNext())
} // private void getAllInstalledActivities()
}
main3.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<ListView
android:id="@+id/android:list"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />
<!-- <ImageView -->
<!--android:id="@+id/ImageView02" -->
<!--android:layout_width="fill_parent" -->
<!--android:layout_height="wrap_content" -->
<!--android:layout_marginBottom="10dp" -->
<!--android:paddingBottom="5dp" -->
</LinearLayout>
答案 0 :(得分：3)
要获取已安装应用程序的名称和图标，您需要使用Package Manager类，这里有一段代码，可以让您获取应用程序的名称和图标
import android.app.Activity;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
public class FetchApplicationsActivity extends Activity {
TextView data;
ImageView image1;
LinearLayout holdlayout;
View l1;
private ArrayList results;
List<ResolveInfo> list;
TextView result;
String str = "";
Drawable icon;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
l1 = findViewById(R.id.Layout1);
results = new ArrayList();
PackageManager pm = this.getPackageManager();
Intent intent = new Intent(Intent.ACTION_MAIN, null);
intent.addCategory(Intent.CATEGORY_LAUNCHER);
list = pm.queryIntentActivities(intent,
PackageManager.PERMISSION_GRANTED);
for (ResolveInfo rInfo : list) {
str = rInfo.activityInfo.applicationInfo.loadLabel(pm).toString()
+ "\n";
results.add(rInfo.activityInfo.applicationInfo.loadLabel(pm)
.toString());
Log.w("Installed Applications", rInfo.activityInfo.applicationInfo
.loadLabel(pm).toString());
icon = rInfo.activityInfo.applicationInfo.loadIcon(pm);
holdlayout = new LinearLayout(getApplicationContext());
holdlayout.setOrientation(LinearLayout.HORIZONTAL);
data = new TextView(getApplicationContext());
data.setText(str);
image1 = new ImageView(getApplicationContext());
image1.setBackgroundDrawable(icon);
((ViewGroup) holdlayout).addView(image1);
((ViewGroup) holdlayout).addView(data);
((ViewGroup) l1).addView(holdlayout);
}
}
}
修改您可以将main.xml定义为
?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<ScrollView
android:id="@+id/scrollView1"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<LinearLayout
android:id="@+id/Layout1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
</LinearLayout>
</ScrollView>
</LinearLayout>
在这里，我创建了动态textviews，Imageviews和layouts来显示名称和图标。您可以创建自己的自定义列表来显示此信息。
Edit2 - 这是how to create customized list上的一个很好的链接，也看起来here。我认为这些将解决这个问题。
答案 1 :(得分：1)
我遵循本教程，对我非常有帮助：
class PInfo {
private String appname = "";
private String pname = "";
private String versionName = "";
private int versionCode = 0;
private Drawable icon;
private void prettyPrint() {
Log.v(appname + "\t" + pname + "\t" + versionName + "\t" + versionCode);
}
}
private ArrayList<PInfo> getPackages() {
ArrayList<PInfo> apps = getInstalledApps(false); /* false = no system packages */
final int max = apps.size();
for (int i=0; i<max; i++) {
apps.get(i).prettyPrint();
}
return apps;
}
private ArrayList<PInfo> getInstalledApps(boolean getSysPackages) {
ArrayList<PInfo> res = new ArrayList<PInfo>();
List<PackageInfo> packs = getPackageManager().getInstalledPackages(0);
for(int i=0;i<packs.size();i++) {
PackageInfo p = packs.get(i);
if ((!getSysPackages) && (p.versionName == null)) {
continue ;
}
PInfo newInfo = new PInfo();
newInfo.appname = p.applicationInfo.loadLabel(getPackageManager()).toString();
newInfo.pname = p.packageName;
newInfo.versionName = p.versionName;
newInfo.versionCode = p.versionCode;
newInfo.icon = p.applicationInfo.loadIcon(getPackageManager());
res.add(newInfo);
}
return res;
}