Android non-Activity class reference Getresources () method Problem Solving method

In the process of Android development, the Getresources () method is referenced in a non-activity class (Where the class name is assumed to be Mynewclass), as follows:

Bitmap bmp = Bitmapfactory.decoderesource (Getresources (), r.drawable.marker_red);

Result error Message Tip: There is no getresources () method in Mynewclass.class.

In Baidu and Google on a variety of search, there is no suitable solution.

Someone who solves this:

You can pass pointers to your activity, where you call the Getapplicationcontext () method, or you want to use getcontext () .

One, instead of bitmap bmp = Bitmapfactory.decoderesource (Context.getresources (), r.drawable.marker_red); and bitmap bmp = Bitmapfactory.decoderesource (This.getresources (), r.drawable.marker_red);

If you try, you know it's not possible (I can't do it anyway, but if it should be OK in the Activity Class).

Second, make the following changes in Acitivity:

public static Resources resourcesinstance;
Resourcesinstance=this.getresources ();

Mynewclass.class So quote:

Bitmap Bitmap = Bitmapfactory.decoderesource (myactivity.resourcesinstance, r.drawable.test);
In this way, the code is not wrong, but there is a nullpointerexception program run crashes.

Although the problem is not resolved, but to see such two words:

"To pass a Context (such as activity or application,service) in the constructor of a class to come in" and "Android.content.Context, Getresources based on activity. "

Inspired by this, two solutions are found:

Method One: Create the getresources () method in Mynewclass.class:

Private Resources getresources () {
TODO auto-generated Method Stub
Resources mresources = null;
Mresources = Getresources ();
return mresources;
}

You will find that the error is gone and the result is normal.

Method Two: The context is passed in the Myactivity.class constructor function. Declares a context, and constructs the method GetContext (). The specific code is as follows:

To perform context transfer in Myactivity.class:

public class MyActivity extends Activity {
......

......
private static context context = NULL;
......

......
@Override
protected void OnCreate (Bundle savedinstancestate) {
Super.oncreate (savedinstancestate);

Setcontentview (R.layout.view);

......

......

Public static Context GetContext () {
return Context;
}

To make a reference to a method in Mynewclass.class:

Bitmap bmp = Bitmapfactory.decoderesource (Myactivity.getcontext (). Getresources (), r.drawable.marker_red);

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This is the workaround for the non-activity class reference Getresources () method problem that was created for yourself.

Android non-Activity class reference Getresources () method Problem Solving method