我正在创建一个应用程序,我想要一个允许用户下载我的文件的下载按钮。那么我该如何制作这样的按钮?
答案 0 :(得分:0)
这是两个问题......
首先你需要一个普通的Button [在yourlayoutfile.yml中执行此操作]
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/activity_test"
android:layout_width="match_parent"
android:layout_height="match_parent">
<Button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="198dp"
android:text="Download" />
</RelativeLayout>
现在在你的Button中为你的Button设置一个OnClickListener:
public class MainActivity extends AppCompatActivity {
private Button downloadButton;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_test);
downloadButton= (Button) findViewById(R.id.button);
downloadButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
downloadFile();
}
});
}
public void downloadFile() {
//Here put-in youre download stuff
//so download the file from your server
}
}
希望这会有所帮助:)
答案 1 :(得分:0)
创建void downloadFile(URI uri)你必须使用URI示例 -
DownloadManager downloadManager = (DownloadManager)
getActivity().getSystemService(Context.DOWNLOAD_SERVICE);
DownloadManager.Request request = new DownloadManager.Request(uri);
request.setTitle("your tittle");
request.setDescription("your description");
request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
Long reference = downloadManager.enqueue(request);
在最后设置onclick方法并写
Uri urifile = Uri.parse("your file address");
downloadfile(urifile);