包工具类 PackageUtils

import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.text.TextUtils;

import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;

import java.lang.reflect.Type;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Locale;

public class PackageUtils {
private Context context;


public PackageUtils(Context context) {
this.context = context;
}

public static AllPackageInfos getAllPackageInfos(Context context) {
PackageManager packageManager = context.getPackageManager();
AllPackageInfos infos = new AllPackageInfos();
List<PackageInfo> installedPackages = context.getPackageManager().getInstalledPackages(0);
for (PackageInfo info : installedPackages) {
AllPackageInfo aInfo = new AllPackageInfo();
aInfo.setVersionName(info.versionName);
aInfo.setVersionCode(info.versionCode);
aInfo.setPackageName(info.packageName);
aInfo.setFirstInstallTime(info.firstInstallTime);
aInfo.setLastUpdateTime(info.lastUpdateTime);
aInfo.setName(packageManager.getApplicationLabel(info.applicationInfo).toString());
aInfo.setSystem((ApplicationInfo.FLAG_SYSTEM & info.applicationInfo.flags) != 0);//是否为系统文件
infos.add(aInfo);
}
return infos;
}

public static String getAllPackageInfo(Context context) {
try {
Type founderListType = new TypeToken<AllPackageInfos>() {
}.getType();
return new Gson().toJson(getAllPackageInfos(context), founderListType);
} catch (Exception e) {
e.printStackTrace();
}
return "";
}

public static void log(Context context) {
List<PackageUtils.AllPackageInfo> infos = getAllPackageInfos(context).getInfos();
for (int i = 0; i < infos.size(); i++) {
if (infos.get(i).isSystem()) {
android.util.Log.i("调试信息", "系统应用: " + infos.get(i).getName() + " = " + infos.get(i).getPackageName());
}
}
for (int i = 0; i < infos.size(); i++) {
if (!infos.get(i).isSystem()) {
android.util.Log.i("调试信息", "用户应用: " + infos.get(i).getName() + " = " + infos.get(i).getPackageName());
}
}

}


/**
* 检测该包名所对应的应用是否存在
*
* @param packageName 包名
* @return 指定应用是否已安装
*/
public static boolean isInstall(Context context, String packageName) {

PackageManager packageManager = context.getApplicationContext().getPackageManager();
if (packageName == null || TextUtils.isEmpty(packageName)) {
return false;
}

try {
context.getPackageManager().getApplicationInfo(packageName, PackageManager.GET_UNINSTALLED_PACKAGES);
return true;
} catch (PackageManager.NameNotFoundException e) {
e.printStackTrace();
}

try {
PackageInfo packageInfo = packageManager.getPackageInfo(packageName, PackageManager.GET_GIDS);
return packageInfo != null;
} catch (PackageManager.NameNotFoundException e) {
e.printStackTrace();
return false;
}
}

/**
* 将时间戳转换为时间
*/
public static String stampToDate(long time) {
String res;
SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss", Locale.CHINA);
Date date = new Date(time);
res = simpleDateFormat.format(date);
return res;
}

public static class AllPackageInfos {
private List<AllPackageInfo> packageInfos;

public AllPackageInfos() {
this.packageInfos = new ArrayList<>();
}

public List<AllPackageInfo> getInfos() {
return packageInfos;
}

public void add(AllPackageInfo allPackageInfo) {
packageInfos.add(allPackageInfo);
}
}

public static class AllPackageInfo {
/**
* 版本名称
*/
private String versionName;
/**
* 应用名称
*/
private String name;
/**
* 版本号
*/
private int versionCode;
/**
* 包名
*/
private String packageName;
/**
* 是否是系统应用
*/
private boolean system;
/**
* 第一次安装时间
*/
private String firstInstallTime;
/**
* 最后更新时间
*/
private String lastUpdateTime;

public boolean isSystem() {
return system;
}

public void setSystem(boolean system) {
this.system = system;
}

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}

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 String getPackageName() {
return packageName;
}

public void setPackageName(String packageName) {
this.packageName = packageName;
}

public String getFirstInstallTime() {
return firstInstallTime;
}

public void setFirstInstallTime(long firstInstallTime) {
this.firstInstallTime = stampToDate(firstInstallTime);
}

public String getLastUpdateTime() {
return lastUpdateTime;
}

public void setLastUpdateTime(long lastUpdateTime) {
this.lastUpdateTime = stampToDate(lastUpdateTime);
}
}

public static boolean isSystemApp(Context context, Intent intent) {
PackageManager pm = context.getPackageManager();
ComponentName cn = intent.getComponent();
String packageName = null;
if (cn == null) {
ResolveInfo info = pm.resolveActivity(intent, PackageManager.MATCH_DEFAULT_ONLY);
if ((info != null) && (info.activityInfo != null)) {
packageName = info.activityInfo.packageName;
}
} else {
packageName = cn.getPackageName();
}
if (packageName != null) {
try {
PackageInfo info = pm.getPackageInfo(packageName, 0);
return (info != null) && (info.applicationInfo != null) &&
((info.applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) != 0);
} catch (PackageManager.NameNotFoundException e) {
return false;
}
} else {
return false;
}
}
}