android获取软件列表-白红宇

android获取软件列表

阅读量：6150 次

发布时间：2019-06-21

本文共 5348 字，大约阅读时间需要 17 分钟。

这个demo实现了一个软件列表的功能

这个是截图有需要的朋友可以参考一下：

MainActivity

package com.sunjialiang;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import android.app.Activity;

import android.content.Context;

import android.content.Intent;

import android.content.pm.PackageInfo;

import android.content.pm.PackageManager;

import android.net.Uri;

import android.os.Bundle;

import android.provider.Settings;

import android.view.View;

import android.view.View.OnLongClickListener;

import android.widget.Adapter;

import android.widget.AdapterView;

import android.widget.AdapterView.OnItemLongClickListener;

import android.widget.ListAdapter;

import android.widget.ListView;

* 实现获取软件的程序名称包名以及图标*/

public class MainActivity extends Activity implements OnItemLongClickListener{

private ListView lv;

Adapter adapter;

ArrayList<HashMap<String, Object>> items=new ArrayList<HashMap<String, Object>>();

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

lv = (ListView) findViewById(R.id.lv);

PackageManager pm= getPackageManager();

//得到PackageManager对象

List<PackageInfo> packs = pm.getInstalledPackages(0);

//得到系统安装的所有程序包的PackageInfo对象

for (PackageInfo pi : packs) {

HashMap<String, Object> map = new HashMap<String, Object>();

map.put("icon", pi.applicationInfo.loadIcon(pm));

//图标

map.put("appName", pi.applicationInfo.loadLabel(pm));

//应用名

map.put("packageName", pi.packageName);

//包名

items.add(map);

//循环读取存到HashMap,再增加到ArrayList.一个HashMap就是一项

}

adapter = new adapter(this, items, R.layout.piitem, new String[] {

"icon", "appName", "packageName" }, new int[] { R.id.icon,

R.id.appName, R.id.packageName });

//参数:Context,ArrayList(item的集合),item的layout,包含ArrayList中Hashmap的key的数组,key所对应的值相对应的控件id

lv.setAdapter((ListAdapter) adapter);

}

@Override

public boolean onItemLongClick(AdapterView<?> adapterView, View view, int position,

long id) {

return false;

}

}

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适配器

package com.sunjialiang;

import java.util.List;

import java.util.Map;

import android.content.Context;

import android.graphics.drawable.Drawable;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.ImageView;

import android.widget.SimpleAdapter;

import android.widget.TextView;

public class adapter extends SimpleAdapter {

private int[] mTo;

private String[] mFrom;

private ViewBinder mViewBinder;

private List<? extends Map<String, ?>> mData;

private int mResource;

private LayoutInflater mInflater;

public adapter(Context context, List<? extends Map<String, ?>> data,

int resource, String[] from, int[] to) {

super(context, data, resource, from, to);

mData = data;

mResource = resource;

mFrom = from;

mTo = to;

mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

}

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

return createViewFromResource(position, convertView, parent, mResource);

}

private View createViewFromResource(int position, View convertView,

ViewGroup parent, int resource) {

View v;

if (convertView == null) {

v = mInflater.inflate(resource, parent, false);

final int[] to = mTo;

final int count = to.length;

final View[] holder = new View[count];

for (int i = 0; i < count; i++) {

holder[i] = v.findViewById(to[i]);

}

v.setTag(holder);

} else {

v = convertView;

}

bindView(position, v);

return v;

}

private void bindView(int position, View view) {

final Map dataSet = mData.get(position);

if (dataSet == null) {

return;

}

final ViewBinder binder = mViewBinder;

final View[] holder = (View[]) view.getTag();

final String[] from = mFrom;

final int[] to = mTo;

final int count = to.length;

for (int i = 0; i < count; i++) {

final View v = holder[i];

if (v != null) {

final Object data = dataSet.get(from[i]);

String text = data == null ? "" : data.toString();

if (text == null) {

text = "";

}

boolean bound = false;

if (binder != null) {

bound = binder.setViewValue(v, data, text);

}

if (!bound) {

//自定义适配器，关键在这里，根据传过来的控件类型以及值的数据类型，执行相应的方法

//可以根据自己需要自行添加if语句。另CheckBox等继承自TextView的控件也会被识别成TextView，这就需要判断值的类型了

if (v instanceof TextView) {

//如果是TextView控件

setViewText((TextView) v, text);

//调用SimpleAdapter自带的方法，设置文本

} else if (v instanceof ImageView) {//如果是ImageView控件

setViewImage((ImageView) v, (Drawable) data);

//调用下面自己写的方法，设置图片

} else {

throw new IllegalStateException(v.getClass().getName() + " is not a " +

" view that can be bounds by this SimpleAdapter");

}

}

}

}

}

public void setViewImage(ImageView v, Drawable value) {

v.setImageDrawable(value);

}

}

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模板文件.xml

piitem.xml

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:orientation="horizontal" android:layout_width="fill_parent"

android:layout_height="fill_parent">

<ImageView android:layout_width="48dip" android:id="@+id/icon" android:layout_height="48dip"></ImageView>

<LinearLayout android:orientation="vertical"

android:layout_width="fill_parent"

android:layout_height="wrap_content">

<TextView android:id="@+id/appName"

android:layout_width="fill_parent"

android:layout_height="wrap_content" />

<TextView android:id="@+id/packageName"

android:layout_width="fill_parent"

android:layout_height="wrap_content" />

</LinearLayout>

</LinearLayout>

复制代码

主xml里面只是一个ListView 。

转载于:https://my.oschina.net/limbusnet/blog/75466

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