Java 在Android 9中使用DownloadManager下载失败
我的服务器中有一个xls文件,需要使用应用程序在手机中下载。我正在使用诺基亚5和安卓9进行测试。我的编译sdk版本是29。当我点击下载按钮时,它什么也没做,等了一会儿,一个“下载不成功”的通知弹出 这是我的MainActivity.javaJava 在Android 9中使用DownloadManager下载失败,java,android,android-download-manager,Java,Android,Android Download Manager,我的服务器中有一个xls文件,需要使用应用程序在手机中下载。我正在使用诺基亚5和安卓9进行测试。我的编译sdk版本是29。当我点击下载按钮时,它什么也没做,等了一会儿,一个“下载不成功”的通知弹出 这是我的MainActivity.java public class MainActivity extends AppCompatActivity { private static final int PERMISSION_STORAGE_CODE = 1000; EditText
public class MainActivity extends AppCompatActivity {
private static final int PERMISSION_STORAGE_CODE = 1000;
EditText editUrl;
Button btnDownload;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
editUrl = findViewById(R.id.edit_url);
btnDownload = findViewById(R.id.btn_download);
btnDownload.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (checkSelfPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_DENIED) {
String [] permissions = {Manifest.permission.WRITE_EXTERNAL_STORAGE};
requestPermissions(permissions, PERMISSION_STORAGE_CODE);
}
else {
startDownloading();
}
}
else {
startDownloading();
}
}
});
}
private void startDownloading() {
String url = editUrl.getText().toString().trim();
DownloadManager.Request request = new DownloadManager.Request(Uri.parse(url));
request.setAllowedNetworkTypes(DownloadManager.Request.NETWORK_WIFI | DownloadManager.Request.NETWORK_MOBILE);
request.setTitle("Download");
request.setDescription("Downloading file...");
request.allowScanningByMediaScanner();
request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, ""+System.currentTimeMillis());
DownloadManager manager = (DownloadManager) getSystemService(Context.DOWNLOAD_SERVICE);
manager.enqueue(request);
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
switch(requestCode) {
case PERMISSION_STORAGE_CODE: {
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED)
startDownloading();
else
Toast.makeText(this, "Permission Denied", Toast.LENGTH_SHORT).show();
}
}
}
}
我添加了network\u security\u config.xml(由于安全原因,域变得模糊)
moneytracker.mauini*****.com
并将其添加到清单中
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.main.downloadtest">
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.WRITE_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:theme="@style/AppTheme"
android:networkSecurityConfig="@xml/network_security_config"
android:usesCleartextTraffic="true">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
******.com/uploads/asd.xls
在浏览器中执行该URL时,文件将成功下载
我错过什么了吗?这就是我所能得到的,寻找了几天。请帮忙。你修好了吗?你修好了吗?
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.main.downloadtest">
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.WRITE_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:theme="@style/AppTheme"
android:networkSecurityConfig="@xml/network_security_config"
android:usesCleartextTraffic="true">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>