Question

I m试图读/篡改纸面。我在真的电话上和在剪切片上的推器上都尝试这样做。在这两种装置上,允许使用/mnt/sdcard/或/sdcard只是“d--”,我猜测,我可以读写。

我不得不从ec子中的“File view”中打开手脚,而且当我还尝试“adb 拉/mnt/sdcard/test.txt 测试”时,我也可以开口。我拿不到遥远物体。

甲状腺 app的确允许“EPAITE_EXTERNAL_STORAGE”。

例如,我管理时所做的事;

        try {
            File root = Environment.getExternalStorageDirectory();
            Log.e(TAG,root.getAbsolutePath());
                File gpxfile = new File(root, "test.txt");
                FileWriter gpxwriter = new FileWriter(gpxfile);
                BufferedWriter out = new BufferedWriter(gpxwriter);
                out.write("Hello world");
                out.close();
        } catch (IOException e) {
            Log.e(TAG, "Could not write file " + e.getMessage());
        }

I do not get an exception. Any ideas? This problem is killing me!

Answer 1

举例来说,你可以展示从 per铁中摄像的图像,从而需要许可。

许可

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.INTERNET"></uses-permission>

Java档案

package com.sdcard;

import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URL;

import android.app.Activity;
import android.os.Bundle;
import android.os.Environment;

public class SdcardActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        try{
            URL url = new URL ("http://www.coolpctips.com/wp-content/uploads/2011/05/top-30-android-games.jpg");
            InputStream input = url.openStream();
            try {
                OutputStream output = new FileOutputStream  (Environment.getExternalStorageDirectory()+"/top-30-android-games.jpg");
                int aReasonableSize = 1000;
                byte[] buffer = new byte[aReasonableSize];
                int bytesRead = 0;;
                try {
                    while ((bytesRead = input.read(buffer)) > 0) {
                        output.write(buffer, 0, bytesRead);
                    }
                } finally {
                    output.close();
                }
            } finally {
                input.close();
            }
            }catch (Exception e) {
                e.printStackTrace();
            }
        }

www.un.org/Depts/DGACM/index_spanish.htm 一段时间后,我们在互联网连接失灵或无法找到明卡的装置方面也面临问题。

友情链接