Question

我的SD卡上有一个文件。当我通常打开并使用“officesuite”进行更改时，我可以保存更改。当我在我的应用程序中打开它时，“officesuite”显示它，但它无法保存更改，绝不会回到我的活动。有什么想法吗？这是我的代码：

import java.io.File;
import java.net.URI;

import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.webkit.MimeTypeMap;

public class OfficesuiteSaveAsActivity extends Activity {
    private String fileDir;
    private File file;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedlnstanceState) {
        super.onCreate(savedlnstanceState);
        setContentView(R.layout.main);
        String sdCardDir = Environment.getExternalStorageDirectory()
                .getAbsolutePath();
        String fileName = "TestofficeSuite.docx";
        fileDir = sdCardDir + File.separator + fileName;
        file = new File(fileDir);
        displayFile(file.toURI());
    }

    public void displayFile(URI uriString) {
        Uri data = Uri.parse(uriString.toString());
        Intent newlntent1 = new Intent();
        newlntent1.setAction(Intent.ACTION_VIEW);
        MimeTypeMap mtm = MimeTypeMap.getSingleton();
        newlntent1.setDataAndType(data, mtm.getMimeTypeFromExtension("docx"));
        startActivity(newlntent1);
    }
}

Answer 1

我检查sdcard中文件的“Uri.parse（file.toURI（）。toString（））”和“Uri.fromFile（）”的值： “Uri.parse（file.toURI（）。toString（））”像“file：/ mnt / ...”一样开始，“Uri.fromFile（）”的开头就像“file：/// mnt / ...” ！所以我改变代码并且工作正常：

public class OfficesuiteSaveAsActivity extends Activity {
    private String fileDir;
    private File file;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedlnstanceState) {
        super.onCreate(savedlnstanceState);
        setContentView(R.layout.main);
        String sdCardDir = Environment.getExternalStorageDirectory()
                .getAbsolutePath();
        String fileName = "TestofficeSuite.docx";
        fileDir = sdCardDir + File.separator + fileName;
        file = new File(fileDir);
        displayFile(file);
    }

    public void displayFile(File file) {
        Uri data = Uri.fromFile(file);
        Intent newlntent1 = new Intent();
        newlntent1.setAction(Intent.ACTION_VIEW);
        MimeTypeMap mtm = MimeTypeMap.getSingleton();
        newlntent1.setDataAndType(data, mtm.getMimeTypeFromExtension("docx"));
        startActivity(newlntent1);
    }
}

保存文件的更改？

1 个答案: