Tag Archives: Android Error

Android Error: failed linking file resources

I wrote it in the evening, and the next morning I made a mistake.

I’ve been through this hole more than once. Finally, I want to remember it.

failed linking file resources   Resource file not found.

There are many reasons. Here I will record the problems I encountered first

1. The file referenced in the XML file does not exist

After checking, it turned out that the first image was deleted, but the XML file did not report an error_ T

As a result, it needs to be recompiled when it is reopened the next day, which is the reason for the error.

Android Error: open failed: EACCES (Permission denied)

When using Android to read SD card data, an error is reported. The reason is that after Android 6.0, in addition to adding read and write permissions in androidmanifest.xml, you also need to manually request permissions when using it.

1. Add read and write permissions to androidmanifest.xml:

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

2. To manually request permission before reading or writing:

import android.support.v4.app.ActivityCompat;

private static final int REQUEST_EXTERNAL_STORAGE = 1;
private static String[] PERMISSIONS_STORAGE = {
    Manifest.permission.READ_EXTERNAL_STORAGE,
    Manifest.permission.WRITE_EXTERNAL_STORAGE
};

/**
 * Call this method before reading or writing to the sd card
 * Checks if the app has permission to write to device storage
 * If the app does not has permission then the user will be prompted to grant permissions
 */
public static void verifyStoragePermissions(Activity activity) {
    // Check if we have write permission
    int permission = ActivityCompat.checkSelfPermission(activity, Manifest.permission.WRITE_EXTERNAL_STORAGE);
    if (permission != PackageManager.PERMISSION_GRANTED) {
        // We don't have permission so prompt the user
        ActivityCompat.requestPermissions(activity, PERMISSIONS_STORAGE, REQUEST_EXTERNAL_STORAGE);
    }
}

Note: activitycompat is the method in android-support-v4.jar.