apk 包可以使用PackageManager获取，apk 包中的资源可以获取其对应的Context,再通过Context获取对应的Resouce获取提示2: apk 是指已经安装过的程序，不是存在sdcard. 上的apk安装包.
先上效果图
开始代码部分
首先是布局文件activity_main.xml
<?xml version="1.0" enCoding="utf-8"?><linearLayout xmlns:androID="http://schemas.androID.com/apk/res/androID" xmlns:app="http://schemas.androID.com/apk/res-auto" xmlns:tools="http://schemas.androID.com/tools" androID:layout_wIDth="match_parent" androID:layout_height="match_parent" androID:orIEntation="vertical" tools:context="com.nf.appList.MainActivity"> <linearLayout androID:layout_wIDth="match_parent" androID:layout_height="48dp" androID:paddingleft="16dp" androID:paddingRight="16dp"> <Switch androID:ID="@+ID/switch_type" androID:layout_wIDth="wrap_content" androID:layout_height="wrap_content" androID:checked="true" /> <EditText androID:ID="@+ID/edit_input" androID:layout_wIDth="0dp" androID:layout_height="match_parent" androID:layout_weight="1" androID:hint="请输入包名前缀" androID:singleline="true" androID:textcolor="#333333" androID:textSize="14sp" /> <button androID:ID="@+ID/btn_scan" androID:layout_wIDth="wrap_content" androID:layout_height="wrap_content" androID:text="扫描" androID:textcolor="#333333" androID:textSize="14sp" /> </linearLayout> <relativeLayout androID:layout_wIDth="match_parent" androID:layout_height="match_parent"> <ListVIEw androID:ID="@+ID/List_vIEw" androID:layout_wIDth="match_parent" androID:layout_height="match_parent" /> <TextVIEw androID:ID="@+ID/tv_empty" androID:layout_wIDth="wrap_content" androID:layout_height="wrap_content" androID:layout_centerInParent="true" androID:text="没有找到任何包" androID:textcolor="#333333" androID:textSize="14sp" androID:visibility="gone" /> </relativeLayout></linearLayout>
ListVIEw的item布局
<?xml version="1.0" enCoding="utf-8"?><linearLayout xmlns:androID="http://schemas.androID.com/apk/res/androID" xmlns:tools="http://schemas.androID.com/tools" androID:layout_wIDth="match_parent" androID:layout_height="58dp" androID:gravity="center_vertical" androID:paddingleft="16dp" androID:paddingRight="16dp"> <!-- tools 域 表示 仅在预览时生效 --> <ImageVIEw androID:ID="@+ID/iv_app_icon" androID:layout_wIDth="40dp" androID:layout_height="40dp" tools:src="@mipmap/ic_launcher" /> <linearLayout androID:layout_wIDth="match_parent" androID:layout_height="wrap_content" androID:layout_marginleft="16dp" androID:orIEntation="vertical"> <TextVIEw androID:ID="@+ID/tv_app_name" androID:layout_wIDth="wrap_content" androID:layout_height="wrap_content" androID:textcolor="#333333" androID:textSize="14sp" tools:text="应用名称" /> <TextVIEw androID:ID="@+ID/tv_app_package" androID:layout_wIDth="wrap_content" androID:layout_height="wrap_content" androID:layout_margintop="2dp" androID:textcolor="#888888" androID:textSize="12sp" tools:text="应用包名" /> </linearLayout></linearLayout>
然后是实体类SimpleAppInfo.class
public class SimpleAppInfo { private String appname; private String appPackage; private Drawable appIcon; private String valuesAppname; private Drawable drawablePreIEwimg; private boolean system; private String packagePath; private String versionname; private int versionCode; public SimpleAppInfo(String appname,String appPackage,Drawable appIcon,boolean system,String packagePath,String versionname,int versionCode) { this.appname = appname; this.appPackage = appPackage; this.appIcon = appIcon; this.system = system; this.packagePath = packagePath; this.versionname = versionname; this.versionCode = versionCode; } public String getPackagePath() { return packagePath; } public voID setPackagePath(String packagePath) { this.packagePath = packagePath; } public String getVersionname() { return versionname; } public voID setVersionname(String versionname) { this.versionname = versionname; } public int getVersionCode() { return versionCode; } public voID setVersionCode(int versionCode) { this.versionCode = versionCode; } public boolean isSystem() { return system; } public voID setSystem(boolean system) { this.system = system; } public String getAppname() { return appname; } public voID setAppname(String appname) { this.appname = appname; } public String getAppPackage() { return appPackage; } public voID setAppPackage(String appPackage) { this.appPackage = appPackage; } public Drawable getAppIcon() { return appIcon; } public voID setAppIcon(Drawable appIcon) { this.appIcon = appIcon; } public String getValuesAppname() { return valuesAppname; } public voID setValuesAppname(String valuesAppname) { this.valuesAppname = valuesAppname; } public Drawable getDrawablePreIEwimg() { return drawablePreIEwimg; } public voID setDrawablePreIEwimg(Drawable drawablePreIEwimg) { this.drawablePreIEwimg = drawablePreIEwimg; }}
接下来就是核心代码了MainActivity.class
public class MainActivity extends AppCompatActivity { private TextVIEw tvEmpty; private ListVIEw ListVIEw; private button btnScan; private EditText editinput; private List<SimpleAppInfo> filterappList = new ArrayList<>(); private BaseAdapter applistadapter; private Switch switchType; @OverrIDe protected voID onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentVIEw(R.layout.activity_main); tvEmpty = findVIEwByID(R.ID.tv_empty); ListVIEw = findVIEwByID(R.ID.List_vIEw); btnScan = findVIEwByID(R.ID.btn_scan); editinput = findVIEwByID(R.ID.edit_input); switchType = findVIEwByID(R.ID.switch_type); switchType.setonCheckedchangelistener(new Compoundbutton.OnCheckedchangelistener() { @OverrIDe public voID onCheckedChanged(Compoundbutton buttonVIEw,boolean isChecked) { applistadapter.notifyDataSetChanged(); } }); btnScan.setonClickListener(new VIEw.OnClickListener() { @OverrIDe public voID onClick(VIEw v) { //防止重复点击 btnScan.setEnabled(false); ListVIEw.setVisibility(VIEw.GONE); tvEmpty.setVisibility(VIEw.VISIBLE); tvEmpty.setText("正在扫描"); //开子线程做耗时的工作 new Thread() { @OverrIDe public voID run() { final List<SimpleAppInfo> appsInfo = getAppsInfo(); //切换到主线程 更新数据 runOnUiThread(new Runnable() { @OverrIDe public voID run() { String filterStr = editinput.getText().toString().trim(); if (TextUtils.isEmpty(filterStr)) { filterappList = appsInfo; } else {//过滤 filterappList.clear(); for (SimpleAppInfo appInfo : appsInfo) { if (appInfo.getAppPackage().startsWith(filterStr)) { filterappList.add(appInfo); } } } if (filterappList.size() == 0) { tvEmpty.setVisibility(VIEw.VISIBLE); ListVIEw.setVisibility(VIEw.GONE); tvEmpty.setText("没有任何数据"); } else { tvEmpty.setVisibility(VIEw.GONE); ListVIEw.setVisibility(VIEw.VISIBLE); applistadapter.notifyDataSetChanged(); } //更新完成后 开放 按钮 btnScan.setEnabled(true); } }); } }.start(); } }); applistadapter = new BaseAdapter() { @OverrIDe public int getCount() { return filterappList.size(); } @OverrIDe public Object getItem(int position) { return filterappList.get(position); } @OverrIDe public long getItemID(int position) { return 0; } @OverrIDe public VIEw getVIEw(int position,VIEw convertVIEw,VIEwGroup parent) { VIEwHolder holder; if (convertVIEw == null) { convertVIEw = VIEw.inflate(MainActivity.this,R.layout.item,null); holder = new VIEwHolder(convertVIEw); convertVIEw.setTag(holder); } else { holder = (VIEwHolder) convertVIEw.getTag(); } SimpleAppInfo appInfo = filterappList.get(position); holder.tvAppPackage.setText(appInfo.getAppPackage()); if (switchType.isChecked()) { //这里是直接展示appInfo提供的 应用名\包名\Icon holder.tvAppname.setText(appInfo.getAppname()); holder.ivAppImage.setimageDrawable(appInfo.getAppIcon()); } else { //使用 指定资源数据 holder.tvAppname.setText(appInfo.getValuesAppname()); holder.ivAppImage.setimageDrawable(appInfo.getDrawablePreIEwimg()); } return convertVIEw; } }; ListVIEw.setAdapter(applistadapter); } public static class VIEwHolder { TextVIEw tvAppname; TextVIEw tvAppPackage; ImageVIEw ivAppImage; public VIEwHolder(VIEw vIEw) { tvAppname = vIEw.findVIEwByID(R.ID.tv_app_name); tvAppPackage = vIEw.findVIEwByID(R.ID.tv_app_package); ivAppImage = vIEw.findVIEwByID(R.ID.iv_app_icon); } } public List<SimpleAppInfo> getAppsInfo() { List<SimpleAppInfo> List = new ArrayList<>(); PackageManager pm = getPackageManager(); if (pm == null) return List; List<PackageInfo> installedPackages = pm.getInstalledPackages(0); for (PackageInfo pi : installedPackages) { SimpleAppInfo ai = getBean(pm,pi); if (ai == null) continue; List.add(ai); } return List; } private SimpleAppInfo getBean(final PackageManager pm,final PackageInfo pi) { if (pi == null) return null; ApplicationInfo ai = pi.applicationInfo; String packagename = pi.packagename; String name = ai.loadLabel(pm).toString(); Drawable icon = ai.loadIcon(pm); String packagePath = ai.sourceDir; String versionname = pi.versionname; int versionCode = pi.versionCode; boolean isSystem = (ApplicationInfo.FLAG_SYstem & ai.flags) != 0;// return new SimpleAppInfo(packagename,name,icon,packagePath,versionname,versionCode,isSystem); SimpleAppInfo simpleAppInfo = new SimpleAppInfo(name,packagename,isSystem,versionCode); try { Resources resources = pm.getResourcesForApplication(packagename); int appnameID = resources.getIDentifIEr("app_name","string",packagename); if (appnameID > 0) { String appname = resources.getString(appnameID); simpleAppInfo.setValuesAppname(appname); } int prevIEwimgID = resources.getIDentifIEr("prevIEw_img","drawable",packagename);// int prevIEwimgID = resources.getIDentifIEr("ic_launcher","drawable",packagename); if (prevIEwimgID > 0) { Drawable drawable = resources.getDrawable(prevIEwimgID); simpleAppInfo.setDrawablePreIEwimg(drawable); } } catch (Exception e) { e.printstacktrace(); } return simpleAppInfo; }}
所有代码均已贴出，并未使用任何第三方包，所以也就不上传demo了，
最后补充说明一下switch的作用
switch 开关 用于控制 显示 条目 内容
switch 开 -> 显示默认的appname 和appIconswitch 关 -> 显示指定的 app_name和prevIEw_img 资源 要是对你有帮助要关注我哦，我和其他人不一样，上代码就上全，绝不藏着掖着 @H_502_2@ 总结
以上是内存溢出为你收集整理的从手机中扫描以com keyboard themestudio为前缀的apk包，使用列表的形式展现全部内容，希望文章能够帮你解决从手机中扫描以com keyboard themestudio为前缀的apk包，使用列表的形式展现所遇到的程序开发问题。
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