我将如何使这个Handler类成为静态的？

Question

Handler mHandler = new Handler() {
    @Override
    public void handleMessage(Message msg) {
        // TODO Auto-generated method stub
        Log.i(tag, "in handler");
        super.handleMessage(msg);
        switch (msg.what) {
            case SUCCESS_CONNECT:
                // DO something
                ConnectedThread connectedThread = new ConnectedThread((BluetoothSocket) msg.obj);
                Toast.makeText(getApplicationContext(), "CONNECT", Toast.LENGTH_SHORT).show();
                String s = "successfully connected";
                connectedThread.write(s.getBytes());
                Log.i(tag, "connected");
                break;
            case MESSAGE_READ:
                byte[] readBuf = (byte[]) msg.obj;
                String string = new String(readBuf);
                Toast.makeText(getApplicationContext(), string, Toast.LENGTH_LONG).show();
                break;
        }
    }
};

I need some help making this Handler class static, but I don't really know how.

Message I get:

This Handler class should be static or leaks might occur (null)

Here's Logcat complaining:

Part 1: pastebin.com/xwy2zEPh

Part 2: pastebin.com/9UBSWyr2

Answer 1

If I get what you mean with static (which is probably not the right term) you want to create a different file, eg MyHandler.java, where you put

public class MyHandler implements Handler {

 private final ApplicationContext context;

 public MyHandler(final ApplicationContext context) {
    // Add Pre Condition for context not null
    this.context = context;
 }

 @Override
 public void handleMessage(Message msg) {
    // TODO Auto-generated method stub
    Log.i(tag, "in handler");
    super.handleMessage(msg);
    switch (msg.what) {
        case SUCCESS_CONNECT:
            // DO something
            ConnectedThread connectedThread = new ConnectedThread((BluetoothSocket) msg.obj);
            Toast.makeText(context, "CONNECT", Toast.LENGTH_SHORT).show();
            String s = "successfully connected";
            connectedThread.write(s.getBytes());
            Log.i(tag, "connected");
            break;
        case MESSAGE_READ:
            byte[] readBuf = (byte[]) msg.obj;
            String string = new String(readBuf);
            Toast.makeText(context, string, Toast.LENGTH_LONG).show();
            break;
    }
 }
}

and then

 final ApplicationContext context = getApplicationContext();
 Handler mHandler = new MyHandler(context);

NB I made the assumption that Handler is an interface...

Edited Due to Andy's comment

Answer 2

I fixed the issue. The reason it was crashing allot was because I forgot to add

@Override
    protected void onResume() {
        super.onResume();
        registerReceiver(receiver, filter);

    }