这篇文章主要介绍“Android如何在一个app中安装并卸载另一个app”,在日常操作中,相信很多人在Android如何在一个app中安装并卸载另一个app问题上存在疑惑,小编查阅了各式资料,整理出简单好用的操作方法,希望对大家解答”Android如何在一个app中安装并卸载另一个app”的疑惑有所帮助!接下来,请跟着小编一起来学习吧!
Android在一个app中安装并卸载另一个app
1.在app→src→main下新建文件夹asserts,将准备安装的apk文件放在asserts内
2.在app→src→main→res下新建文件夹xml,右击xml文件夹,选择new→XML Resource File,File name为文件名,可随意,本文中为filepaths;Root element为资源类型,输入paths,确定并编辑以下代码:
<?xml version="1.0" encoding="utf-8"?> <paths xmlns:android="http://schemas.android.com/apk/res/android"> <external-path name="external_files" path="."/> </paths>
3.编辑AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" package="com.example.myapplication"> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/> <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/> <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:roundIcon="@mipmap/ic_launcher_round" android:supportsRtl="true" android:requestLegacyExternalStorage="true" android:theme="@style/Theme.MyApplication"> <provider android:name="androidx.core.content.FileProvider" android:authorities="包名" android:exported="false" android:grantUriPermissions="true"> <meta-data android:name="android.support.FILE_PROVIDER_PATHS" android:resource="@xml/filepaths步骤2中的文件" /> </provider> <activity android:name=".MainActivity"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> </manifest>
4.MainActivity.java
public class MainActivity extends AppCompatActivity { Context mContext; private Button bt,bt0; private TextView tx; public static boolean isGrantExternalRW(Activity activity) { //权限判定 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && activity.checkSelfPermission( Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) { activity.requestPermissions(new String[]{ Manifest.permission.READ_EXTERNAL_STORAGE, Manifest.permission.WRITE_EXTERNAL_STORAGE }, 1); return false; } return true; } @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mContext = this; tx=findViewById(R.id.text); bt=findViewById(R.id.button);//安装 bt0=findViewById(R.id.button0);//卸载 // Toast.makeText(this, ""+Environment.getExternalStorageDirectory().getAbsolutePath(), 0).show(); if(!this.isGrantExternalRW(MainActivity.this)){return;}//判断是否有权限修改,这很重要 else{ if(copyApkFromAssets(this, "app-debug.apk", Environment.getExternalStorageDirectory().getAbsolutePath()+"/app-debug.apk")){ bt.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { new AlertDialog.Builder(mContext) .setIcon(R.drawable.ic_launcher) .setMessage("是否安装?") .setPositiveButton("yes", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { Intent intent = new Intent(Intent.ACTION_VIEW); intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); // intent.setDataAndType(Uri.parse("file://" + Environment.getExternalStorageDirectory().getAbsolutePath()+"/app-debug.apk"), // "application/vnd.android.package-archive"); File apkFile = new File(Environment.getExternalStorageDirectory()+"/app-debug.apk"); if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) { intent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION); Uri uri = FileProvider.getUriForFile(MainActivity.this, "com.example.myapplication", apkFile); intent.setDataAndType(uri, "application/vnd.android.package-archive"); } else { intent.setDataAndType(Uri.fromFile(apkFile), "application/vnd.android.package-archive"); } mContext.startActivity(intent); } }).show(); } }); bt0.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Uri packageURI = Uri.parse("package:com.example.a22");//package:+想要卸载的包名 Intent intent =new Intent(Intent.ACTION_DELETE); intent.setData(packageURI); mContext.startActivity(intent); } }); } }} public boolean copyApkFromAssets(Context context, String fileName, String path) { //将asserts中的apk文件复制到手机存储中 //可以从手机存储划到最下面,是单独的文件,没有设置文件夹 boolean copyIsFinish = false; try { InputStream is = context.getAssets().open(fileName); File file = new File(path); file.createNewFile(); FileOutputStream fos = new FileOutputStream(file); int length = is.available(); byte[] temp = new byte[length]; int i = 0; while ((i = is.read(temp)) > 0) { fos.write(temp, 0, i); } fos.close(); is.close(); copyIsFinish = true; } catch (IOException e) { e.printStackTrace(); } return copyIsFinish; } }
网络上的教程有很多自相矛盾,本人防止权限出错,把能加的权限都设置了一遍,有空可以选择测试一下,应该有的可以删掉
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