关于Android的按钮事件 [英] About Android button event

问题描述

喜 我是新的Andr​​oid应用程序development.I我练了while.Here Android的发展是什么，我试图做的：

Hi I am new in android application development.I am practicing the android development for a while.Here is what i am trying to do:

在屏幕上有两个名为微调到和从和两个编辑文本按钮，命名为量和结果。我要做到以下几点：

In the screen there is two spinner named "To" and "From" and two edit text button named "Amount" and "Result".i want to do the following:

当清除按钮，点击它会复位到和从为默认值，并明确量和结果。

when Clear button clicked it will reset the "To" and "From" to a default values and clear "Amount" and "Result".

任何人都可以有什么想法？这将是非常有益的，如果我得到的code。 谢谢你。

Can anybody have any idea?it will be very helpful if i get the code. Thanks.

推荐答案

这仅仅是原油code，我没有测试过，我只是写在我的头顶，所以可以有一些错误，我刚刚就任的一些布局ID。你必须明白这一点。

This is just the crude code, I haven't tested, I just wrote on top of my head, so there can be some errors and I just assumed some layout ids. You need to figure that out.

public class SpinnerExample extends Activity {
private String array_spinner[];
private Spinner toSpinner;
private Spinner fromSpinner;
private Button btnClear;
private EditText etAmount;
private EditText etResult;
@Override
public void onCreate(Bundle savedInstanceState) {
     super.onCreate(savedInstanceState);
     setContentView(R.layout.main);
     array_spinner=new String[3];
     array_spinner[0]="1";
     array_spinner[1]="2";
     array_spinner[2]="3";

fromSpinner = (Spinner)findViewById(R.id.fSpinner);
toSpinner = (Spinner)findViewById(R.id.tSpinner);
ArrayAdapter fromadapter = new ArrayAdapter(this,
android.R.layout.fspinneritem, array_spinner);
ArrayAdapter toadapter = new ArrayAdapter(this,android.R.layout.tspinner_item,array_spinner);

btnClear = (Button)findViewById(R.id.clear_button);


btnClear.setOnClickListener(new Button.OnClickListener(){
     public void onClick(View v){
       etAmount = (EditText)findViewById(R.id.amount_et);
       etResult = (EditText)findViewById(R.id.result_et);
       etAmount.setText("");
       etResult.setText("");
       fromSpinner.setAdapter(fromadapter);
       toSpinner.setAdapter(toadapter);
    }
});

}
}

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