android 测试

package com.feng5.test;import android.os.Bundle;import android.app.Activity;import android.view.Menu;import android.view.View;import android.widget.Button;import android.widget.Toast;public class MainActivity extends Activity {    //----    private Button btn = null;    private View.OnClickListener listener=new View.OnClickListener() {                @Override        public void onClick(View v) {            // TODO Auto-generated method stub            Toast.makeText(MainActivity.this, "Hello zh", Toast.LENGTH_LONG).show();        }    };    //----    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        //-----        btn = (Button) findViewById(R.id.button1);        btn.setOnClickListener(listener);        //-----    }        @Override    public boolean onCreateOptionsMenu(Menu menu) {        // Inflate the menu; this adds items to the action bar if it is present.        getMenuInflater().inflate(R.menu.main, menu);        return true;    }}
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