Class BaseActivity

src/com/cloudream/ishow/activity/BaseActivity.java:18–115

import android.util.TypedValue;

public class BaseActivity extends Activity
{
	protected final int PERMISSION_READ_EXTERNAL_STORAGE = 1;
	protected final int PERMISSION_WRITE_EXTERNAL_STORAGE = 2;
	
	@Override
	protected void onCreate(Bundle savedInstanceState)
	{
		super.onCreate(savedInstanceState);
		
	}

	/**
	 * Requests given permission. If the permission has been denied previously, a Dialog will prompt
	 * the user to grant the permission, otherwise it is requested directly.
	 */
	protected void requestPermission(final String permission, String message, final int requestCode)
	{
		if(ContextCompat.checkSelfPermission(this, permission) != PackageManager.PERMISSION_GRANTED)
		{
			if(ActivityCompat.shouldShowRequestPermissionRationale(this, permission))
			{
				// Show an explanation to the user *asynchronously* -- don't block
				// this thread waiting for the user's response! After the user
				// sees the explanation, try again to request the permission.
				new AlertDialog.Builder(this)
					.setTitle(R.string.permission_request)
					.setMessage(message)
					.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener()
					{
						@Override
						public void onClick(DialogInterface dialog, int which)
						{
							requestPermissions(new String[]{ permission }, requestCode);
						}
					})
					.setNegativeButton(android.R.string.cancel, null)
					.show();
			}
		    else  // No explanation needed, we can request the permission.
				ActivityCompat.requestPermissions(this, new String[]{ permission }, requestCode);
		}
	}
	
	/*
	 * checkSelfPermission returning PERMISSION_GRANTED for revoked permission with targetSdkVersion <= 22
	 * http://stackoverflow.com/questions/33407250/checkselfpermission-method-is-not-working-in-targetsdkversion-22
	 */
	public boolean checkSelfPermission(Context context, String permission)
	{
		// For Android < Android Marshmallow(23), self permissions are always granted.
		boolean result = true;

		if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.M)
		{
			// https://developer.android.com/guide/topics/manifest/uses-sdk-element.html
			int targetSdkVersion = Build.VERSION_CODES.BASE;
			try