01_06_src.zip_Mars

package mars.activity03; import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.EditText; import android.widget.TextView; //1.在Activity03当中，要声明四个控件 //2.要为其中的两个控件设置显示的值 //3.创建一个监听器类，监听按钮按下的动作 //4.将监听器类的对象，绑定在按钮对象上 public class Activity03 extends Activity { /** Called when the activity is first created. */ private EditText factorOne ; private EditText factorTwo; private TextView symbol; private Button calculate; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); //根据控件的ID来取得代表控件的对象 factorOne = (EditText)findViewById(R.id.factorOne); factorTwo = (EditText)findViewById(R.id.factorTwo); symbol = (TextView)findViewById(R.id.symbol); calculate = (Button)findViewById(R.id.calculate); //为symbol和calculate设置显示的值 // symbol.setText("乘以"); // calculate.setText("计算"); symbol.setText(R.string.symbol); calculate.setText(R.string.calculate); //将监听器的对象绑定到按钮对象上面 calculate.setOnClickListener(new CalculateListener()); } //当客户点击MENU按钮的时候，调用该方法 @Override public boolean onCreateOptionsMenu(Menu menu) { menu.add(0, 1, 1, R.string.exit); menu.add(0,2,2,R.string.about); return super.onCreateOptionsMenu(menu); } //当客户点击菜单当中的某一个选项时，会调用该方法 @Override public boolean onOptionsItemSelected(MenuItem item) { if(item.getItemId() == 1){ finish(); } return super.onOptionsItemSelected(item); } class CalculateListener implements OnClickListener{ @Override public void onClick(View v) { //取得两个EditText控件的值 String factorOneStr = factorOne.getText().toString(); String factorTwoStr = factorTwo.getText().toString(); //将这两个值存放到Intent对象当中 Intent intent = new Intent(); intent.putExtra("one",factorOneStr); intent.putExtra("two",factorTwoStr); intent.setClass(Activity03.this, ResultActivity.class); //使用这个Intent对象来启动ResultActivity Activity03.this.startActivity(intent); } } }