0

我试图打开一个文件夹Android N，但没有运气。这是我的代码：

File mediaStorageDir = new File(Environment.getExternalStoragePublicDirectory(
        Environment.DIRECTORY_PICTURES), "xyx");

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
    Intent intent = new Intent(Intent.ACTION_VIEW);
    file = FileProvider.getUriForFile(context, "ar.com.xyz.mymobile.provider", mediaStorageDir);
    intent.setData(file);
    context.startActivity(intent);
} else {
    Intent intent = new Intent(Intent.ACTION_VIEW);
    file = Uri.fromFile(mediaStorageDir);
    intent.setDataAndType(file, "*.*");
    context.startActivity(intent);
}

错误：

No Activity found to handle Intent
4

2 回答 2

1

Intent在任何版本的 Android 上，都没有查看目录的标准操作。

此外，FWIW*.*不是 MIME 类型。

于 2018-04-12T21:08:59.063 回答
1

试试下面的例子：

Demo13.class:---------

public class Demo13 extends AppCompatActivity {

private Button b;
private EditText edt;

@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.demo15);

    edt = (EditText) findViewById(R.id.edt);

    b = (Button) findViewById(R.id.b);

    b.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

            if (!edt.getText().toString().isEmpty()) {

                File mediaStorageDir = new File(Environment.getExternalStoragePublicDirectory(
                        Environment.DIRECTORY_PICTURES), edt.getText().toString());

                if(mediaStorageDir.exists()) {
                    Intent intent = new Intent(Intent.ACTION_VIEW);
                    intent.setDataAndType(Uri.fromFile(mediaStorageDir), "resource/folder");
                    Intent chooser = Intent.createChooser(intent, "File");

                    if (intent.resolveActivity(getApplicationContext().getPackageManager()) != null) {
                        startActivity(chooser);

                    } else {
                        createInfoDialog(Demo13.this, "Info", "Found no app that can handle this request. " +
                                "Please install a file browser/manager like ES File Explorer or browse the file yourself by following the path after finished Syn in the log above", new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog, int which) {
                                //nothing
                            }
                        }).show();
                        // if you reach this place, it means there is no file
                        // explorer app installed on your device that can handle this request.
                    }
                }else{
                    createInfoDialog(Demo13.this, "Info", "Sub-Folder not found", new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            // nothing
                        }
                    }).show();
                }
            }else{
                createInfoDialog(Demo13.this, "Info", "Please insert a valid sub-folder name", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        // nothing
                    }
                }).show();
            }
        }
    });

}

public AlertDialog createInfoDialog(Context finalContext, String title, String message,
                                           DialogInterface.OnClickListener onOkListener) {
    AlertDialog a = new AlertDialog.Builder(finalContext).setTitle(
            title)
            .setMessage(message)
            .setNeutralButton("OK", onOkListener).create();

    return a;
}
}

demo13.xml:------------

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">

<EditText
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:hint="Enter a valid sub-folder"
    android:id="@+id/edt"/>

<Button
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:textAllCaps="false"
    android:layout_marginTop="50dp"
    android:text="Open"
    android:id="@+id/b"/>

</LinearLayout>
于 2018-04-13T04:17:17.337 回答