storageemulated0download权限

转载

mob64ca140f9cec 2024-09-13 19:17:18

问题：文件写入失败：java.io.FileNotFoundException: /storage/emulated/0/abc.apk: open failed: EACCES (Permission denied)，做自动更新从服务器下载apk存储到手机上，其他两台真机都能存储成功，唯独三星A7100这台不行，权限都加了。

解决：之后参考github的开源项目，再与自己的做了对比，修改整合解决问题。

开源项目：https://github.com/feicien/android-auto-update

修改前代码：

public class UpdateManger {

// 应用程序Context
private Context mContext;
// 提示消息
private String updateMsg = "有最新的软件包，请下载！";
// 下载安装包的网络路径
private String apkUrl = "http://115.28.6.127:8090/app/1462785029964BirdStore20150929V131.apk";
private Dialog noticeDialog;// 提示有软件更新的对话框
private Dialog downloadDialog;// 下载对话框
private static final String savePath = Environment.getExternalStorageDirectory().getPath()+"/updateDemo/";// 保存apk的文件夹
private static final String saveFileName = savePath
        + "UpdateDemoRelease.apk";
// 进度条与通知UI刷新的handler和msg常量
private ProgressBar mProgress;
private static final int DOWN_UPDATE = 1;
private static final int DOWN_OVER = 2;
private static final int DOWN_FAIL = 3;
private int progress;// 当前进度
private Thread downLoadThread; // 下载线程
private boolean interceptFlag = false;// 用户取消下载
// 通知处理刷新界面的handler
private Handler mHandler = new Handler() {
    @SuppressLint("HandlerLeak")
    @Override
    public void handleMessage(Message msg) {
        switch (msg.what) {
        case DOWN_UPDATE:
            mProgress.setProgress(progress);
            break;
        case DOWN_OVER:
            downloadDialog.cancel();
            installApk();
            break;
        case DOWN_FAIL:
            Toast.makeText(mContext, "下载出错", Toast.LENGTH_SHORT).show();
            break; 
        }
        super.handleMessage(msg);
    }
};

public UpdateManger(Context context) {
    this.mContext = context;
}

// 显示更新程序对话框，供主程序调用
public void checkUpdateInfo() {
    showNoticeDialog();
}

private void showNoticeDialog() {
    android.app.AlertDialog.Builder builder = new android.app.AlertDialog.Builder(
            mContext);// Builder，可以通过此builder设置改变AleartDialog的默认的主题样式及属性相关信息
    builder.setTitle("软件版本更新");
    builder.setMessage(updateMsg);
    builder.setPositiveButton("下载", new OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            dialog.dismiss();// 当取消对话框后进行操作一定的代码？取消对话框
            showDownloadDialog();
        }
    });
    builder.setNegativeButton("以后再说", new OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            dialog.dismiss();
        }
    });
    noticeDialog = builder.create();
    noticeDialog.setCancelable(false);
    noticeDialog.show();
}

protected void showDownloadDialog() {
    android.app.AlertDialog.Builder builder = new android.app.AlertDialog.Builder(
            mContext);
    builder.setTitle("正在下载");
    final LayoutInflater inflater = LayoutInflater.from(mContext);
    View v = inflater.inflate(R.layout.progress, null);
    mProgress = (ProgressBar) v.findViewById(R.id.progress);
    builder.setView(v);// 设置对话框的内容为一个View
    builder.setNegativeButton("取消", new OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            dialog.dismiss();
            interceptFlag = true;
        }
    });
    downloadDialog = builder.create();
    downloadDialog.show();
    downloadApk();
}

private void downloadApk() {
    downLoadThread = new Thread(mdownApkRunnable);
    downLoadThread.start();
}

protected void installApk() {
    File apkfile = new File(saveFileName);
    if (!apkfile.exists()) {
        return;
    }
    Log.e("File.toString()", ""+apkfile.toString());
    Intent i = new Intent(Intent.ACTION_VIEW);
    i.setDataAndType(Uri.parse("file://" + apkfile.toString()),
            "application/vnd.android.package-archive");// File.toString()会返回路径信息
    mContext.startActivity(i);
}

private Runnable mdownApkRunnable = new Runnable() {


    @Override
    public void run() {
        URL url;
        try {
            url = new URL(apkUrl);
            HttpURLConnection conn = (HttpURLConnection) url
                    .openConnection();
            conn.connect();
            int length = conn.getContentLength();
            InputStream ins = conn.getInputStream();
            File file = new File(savePath);
            if (!file.exists()) {
                boolean b = file.mkdirs();
                Log.e("exists", saveFileName+","+b);
            }
            String apkFile = saveFileName;
            File ApkFile = new File(apkFile);
            FileOutputStream outStream = new FileOutputStream(ApkFile);
            int count = 0;
            byte buf[] = new byte[1024];
            do {
                int numread = ins.read(buf);
                count += numread;
                progress = (int) (((float) count / length) * 100);
                // 下载进度
                mHandler.sendEmptyMessage(DOWN_UPDATE);
                if (numread <= 0) {
                    // 下载完成通知安装
                    mHandler.sendEmptyMessage(DOWN_OVER);
                    break;
                }
                outStream.write(buf, 0, numread);
            } while (!interceptFlag);// 点击取消停止下载
            outStream.close();
            ins.close();
        } catch (Exception e) {
            Log.e("Exception", ""+e.getMessage().toString());
            mHandler.sendEmptyMessage(DOWN_FAIL);
            e.printStackTrace();
        }
    }
};

}

修改后代码：

public class
 
// 应用程序Context
private Context mContext;
// 提示消息
private String updateMsg = "有最新的软件包，请下载！";
// 下载安装包的网络路径
private String apkUrl =  "http://115.28.6.127:8090/app/1462785029964BirdStore20150929V131.apk";
private Dialog noticeDialog;// 提示有软件更新的对话框
private Dialog downloadDialog;// 下载对话框
private  static final String  savePath
.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS)
+ "/updateDemo/";// 保存apk的文件夹
private static  final String  saveFileName = savePath
+ "UpdateDemoRelease.apk";
// 进度条与通知UI刷新的handler和msg常量
private ProgressBar mProgress;
private static final int DOWN_UPDATE = 1;
private static final int DOWN_OVER = 2;
private static final int DOWN_FAIL = 3;
private int progress;// 当前进度
private Thread downLoadThread; // 下载线程
private boolean interceptFlag = false;// 用户取消下载
// 通知处理刷新界面的handler
private Handler mHandler = new Handler() {
@SuppressLint("HandlerLeak")
@Override
public  void
switch (msg.what) {
case DOWN_UPDATE:
mProgress.setProgress(progress);
break;
case DOWN_OVER:
downloadDialog.cancel();
installApk();
break;
case DOWN_FAIL:
Toast.makeText(mContext, "下载出错", Toast.LENGTH_SHORT).show();
break;
}
super.handleMessage(msg);
}
};
 
public
this.mContext
}
 
// 显示更新程序对话框，供主程序调用
public  void
showNoticeDialog();
}
 
private  void
android.app.AlertDialog.Builder builder =  new
mContext);// Builder，可以通过此builder设置改变AleartDialog的默认的主题样式及属性相关信息
builder.setTitle("软件版本更新");
builder.setMessage(updateMsg);
builder.setPositiveButton("下载", new
@Override
public  void onClick(DialogInterface dialog, int
dialog.dismiss();// 当取消对话框后进行操作一定的代码？取消对话框
showDownloadDialog();
}
});
builder.setNegativeButton("以后再说", new
@Override
public  void onClick(DialogInterface dialog, int
dialog.dismiss();
}
});
noticeDialog
noticeDialog.setCancelable(false);
noticeDialog.show();
}
 
protected void
android.app.AlertDialog.Builder builder =  new
mContext);
builder.setTitle("正在下载");
final LayoutInflater inflater = LayoutInflater.from(mContext);
View v = inflater.inflate(R.layout.progress, null);
mProgress = (ProgressBar) v.findViewById(R.id.progress);
builder.setView(v);// 设置对话框的内容为一个View
builder.setNegativeButton("取消", new
@Override
public  void onClick(DialogInterface dialog, int
dialog.dismiss();
interceptFlag = true;
}
});
downloadDialog
downloadDialog.show();
downloadApk();
}
 
private  void
downLoadThread = new Thread(mdownApkRunnable);
downLoadThread.start();
}
 
protected void
File dir = StorageUtils.getCacheDirectory(mContext);
String apkName =  apkUrl.substring(apkUrl.lastIndexOf("/") + 1,
apkUrl.length());
File ApkFile = new
if
return;
}
Log.e("File.toString()", ""
Intent i = new Intent(Intent.ACTION_VIEW);
//如果没有设置SDCard写权限，或者没有sdcard,apk文件保存在内存中，需要授予权限才能安装
String[] command = {  "chmod", "777", ApkFile.toString() };
ProcessBuilder builder =  new
try
builder.start();
} catch
e.printStackTrace();
}
i.setDataAndType(Uri.fromFile(ApkFile),
"application/vnd.android.package-archive");// File.toString()会返回路径信息
mContext.startActivity(i);
}
 
private Runnable mdownApkRunnable =  new
 
@Override
public  void
URL url;
try
url = new URL(apkUrl);
HttpURLConnection conn = (HttpURLConnection) url
.openConnection();
conn.connect();
int
InputStream ins = conn.getInputStream();
// File file = new File(savePath);
// if (!file.exists()) {
// boolean b = file.mkdirs();
// Log.e("exists", saveFileName+","+b);
// }
// String apkFile = saveFileName;
// Log.e("exists2", saveFileName);
// File ApkFile = new File(apkFile);
 
File dir = StorageUtils.getCacheDirectory(mContext);
String apkName =  apkUrl.substring(apkUrl.lastIndexOf("/") + 1,
apkUrl.length());
File ApkFile = new
 
FileOutputStream outStream =  new
int
byte buf[] = new byte[1024];
do
int
count += numread;
progress = (int) (((float) count / length) * 100);
// 下载进度
mHandler.sendEmptyMessage(DOWN_UPDATE);
if
// 下载完成通知安装
mHandler.sendEmptyMessage(DOWN_OVER);
break;
}
outStream.write(buf, 0, numread);
} while (!interceptFlag);// 点击取消停止下载
outStream.close();
ins.close();
} catch
Log.e("Exception", ""
mHandler.sendEmptyMessage(DOWN_FAIL);
e.printStackTrace();
}
}
};
 }

主要修改两个地方：

一、文件存储路径，这里用了开源项目中的路径创建；

File dir = StorageUtils.getCacheDirectory(mContext);

String apkName = apkUrl.substring(apkUrl.lastIndexOf("/") + 1,

apkUrl.length());

File ApkFile = new

二、授予权限；

sdcard,apk文件保存在内存中，需要授予权限才能安装

String[] command = {"chmod","777",apkFile.toString()};
ProcessBuilder builder = new ProcessBuilder(command);
builder.start();

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