标签:自定义 new 高工 public mApps position import Android android
/LanchuerTest/src/com/wwj/launcher/HeyWwj.java
Activity
package com.wwj.launcher;
import java.util.List;
import android.app.Activity;
import android.content.ComponentName;
import android.content.Intent;
import android.content.pm.ResolveInfo;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.GridView;
public class HeyWwj extends Activity {
private GridView mGridView;
private List mApps;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
loadApps();
mGridView = (GridView) findViewById(R.id.gridView1);
mGridView.setAdapter(new AppAdapter(this, mApps));
mGridView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
ResolveInfo info = mApps.get(position);
// 应用的包名
String pkg = info.activityInfo.packageName;
// 应用的主Activity
String cls = info.activityInfo.name;
ComponentName componentName = new ComponentName(pkg, cls);
Intent intent = new Intent();
intent.setComponent(componentName);
startActivity(intent);
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}
});
}
/**
- 加载app
*/
private void loadApps() {
Intent intent = new Intent(Intent.ACTION_MAIN, null);
intent.addCategory(Intent.CATEGORY_LAUNCHER);
mApps = getPackageManager().queryIntentActivities(intent, 0);
}
}
自定义适配器
/LanchuerTest/src/com/wwj/launcher/AppAdapter.java
package com.wwj.launcher;
import java.util.List;
import android.content.Context;
import android.content.pm.ResolveInfo;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.ImageView.ScaleType;
public class AppAdapter extends BaseAdapter {
List mApps;
Context context;
public AppAdapter(Context context, List apps) {
super();
this.context = context;
this.mApps = apps;
}
@Override
public int getCount() {
return mApps.size();
}
@Override
public Object getItem(int position) {
return mApps.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ImageView iv;
if (convertView == null) {
iv = new ImageView(context);
iv.setScaleType(ScaleType.FIT_CENTER);
iv.setLayoutParams(new GridView.LayoutParams(50,50));
} else {
iv = (ImageView) convertView;
}
ResolveInfo info = mApps.get(position);
iv.setImageDrawable(info.activityInfo.loadIcon(context.getPackageManager()));
return iv;
}
标签:自定义,new,高工,public,mApps,position,import,Android,android 来源: https://blog.csdn.net/m0_65145548/article/details/122042606
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