android程序无法安装,Android应用内无法安装应用

1.权限

2.配置FileProvider

android:name="androidx.core.content.FileProvider"

android:exported="false"

android:grantUriPermissions="true" >

android:name="android.support.FILE_PROVIDER_PATHS"

android:resource="@xml/filepath" />

filepath中xml内容参照：

3.检查权限：

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {

boolean hasInstallPermission = getPackageManager().canRequestPackageInstalls();

if (!hasInstallPermission) {

startInstallPermissionSettingActivity();

}

}

@RequiresApi(api = Build.VERSION_CODES.O)

private void startInstallPermissionSettingActivity() {

Uri packageURI = Uri.parse("package:" + BuildConfig.APPLICATION_ID);

//注意这个是8.0新API

Intent intent = new Intent(Settings.ACTION_MANAGE_UNKNOWN_APP_SOURCES, packageURI);

startActivityForResult(intent, 1);

}

4.安装

private static void apkIntentInstall(File apkFile,Context mContext){

Intent intent = null;

if (Build.VERSION.SDK_INT > 29){

intent = new Intent();

}else{

intent = new Intent("android.intent.action.VIEW");

}//这个地方需要注意

intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

Uri uri = null;

if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.N){

uri = FileProvider.getUriForFile(mContext,"应用包名.fileProvider", apkFile);//file不用在这里new,直接在外边new然后传进来

intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);

intent.addFlags(Intent.FLAG_GRANT_WRITE_URI_PERMISSION);

}else{

uri = Uri.fromFile(apkFile);

}

intent.setDataAndType(uri, "application/vnd.android.package-archive");

mContext.startActivity(intent);

}