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制作不容易，条件允许情况下，打赏一下，谢谢

作者使用xUtils下载文件，如使用其他框架下载，可在下载逻辑进行修改

AndroidManifest

android:usesCleartextTraffic="true"

...>

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

android:authorities="${applicationId}.fileProvider"

android:exported="false"

android:grantUriPermissions="true">

android:name="android.support.FILE_PROVIDER_PATHS"

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

file_paths.xml

下载逻辑和安装

public class MainActivity extends AppCompatActivity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

permission();

}

//点击下载按钮

public void onDownload(View view) {

if (permission() == false) {

Toast.makeText(this, "未获取权限", Toast.LENGTH_SHORT).show();

return;

}

downLoad();

}

//下载文件

private void downLoad() {

//apk下载链接

String apkUrl = "http://xxx.apk";

//文件路径

String filePath = getExternalCacheDir() + "/Download/file.apk";

//下载

RequestParams params = new RequestParams(apkUrl);

params.setSaveFilePath(filePath);//保存路径

x.http().post(params, new Callback.ProgressCallback() {

@Override

public void onSuccess(File result) {

installAPK(MainActivity.this, result);

}

@Override

public void onError(Throwable ex, boolean isOnCallback) {

}

@Override

public void onCancelled(CancelledException cex) {

}

@Override

public void onFinished() {

}

@Override

public void onWaiting() {

}

@Override

public void onStarted() {

}

@Override

public void onLoading(long total, long current, boolean isDownloading) {

Log.i("MainActivity", "正在下载：" + (int)((float)current/total * 100));

}

});

}

//安装apk

public void installAPK(Context context, File apkFile) {

Intent intent = new Intent(Intent.ACTION_VIEW);

Uri uri;

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {// 判断版本大于等于7.0

uri = FileProvider.getUriForFile(context, context.getPackageName() + ".fileProvider", apkFile);

intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_ACTIVITY_NEW_TASK);

} else {

uri = Uri.parse("file://" + apkFile);

intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

}

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

context.startActivity(intent);

}

//获取权限

private boolean permission() {

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

int REQUEST_CODE_CONTACT = 101;//授权回调标识

//需要的权限

String[] permissions = {

Manifest.permission.WRITE_EXTERNAL_STORAGE //下载的apk保存到手机的权限

};

if (checkSelfPermission(permissions[0]) != PackageManager.PERMISSION_GRANTED) { //未授权

requestPermissions(permissions, REQUEST_CODE_CONTACT); //申请权限

return false;

} else {

return true;

}

}

return true;

}

}

制作不容易，条件允许情况下，打赏一下，谢谢