public class CallActivity extends Activity {    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);                Button button = (Button) this.findViewById(R.id.button1);        button.setOnClickListener(new ButtonOnClickListener());    }        private final class ButtonOnClickListener implements View.OnClickListener{		@Override		public void onClick(View v) {			EditText mobileText = (EditText) findViewById(R.id.moblie);			String number = mobileText.getText().toString();			Intent intent = new Intent();			intent.setAction("android.intent.action.CALL");			intent.addCategory("android.intent.category.DEFAULT");			intent.setData(Uri.parse("tel:" + number));			startActivity(intent); //注册android.intent.category.DEFAULT					}    	    }}