如何将排序字母作为字母表

时间:2013-04-20 00:33:37

标签: java android sorting logcat android-logcat

我是android的新手,我想知道当我点击button1时如何制作,然后button2文本视图将显示1 2 ,,,但如果我点击button2然后button1它将显示2 1

这是我的代码但现在当我点击button1然后按钮2,或者如果我点击button2然后button1它显示相同的,, 请帮助我 感谢名单。

现在我使用getText& setText它按照我的意愿工作,但条件是否正确或不正常工作PLZ帮助!!有什么问题,我的方法是否正确?

protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setRequestedOrientation (ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
    // Full screen
    requestWindowFeature(Window.FEATURE_NO_TITLE);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, 
                             WindowManager.LayoutParams.FLAG_FULLSCREEN);

    setContentView(R.layout.wordgame2);

    bu1 = (Button) findViewById(R.id.bu1);
    bu2 = (Button) findViewById(R.id.bu2);
    bu3 = (Button) findViewById(R.id.bu3);
    bu4 = (Button) findViewById(R.id.bu4);
    bu5 = (Button) findViewById(R.id.bu5);


    t1 = (TextView) findViewById(R.id.t1);

    i1 = (ImageView) findViewById(R.id.i1);
    i2 = (ImageView) findViewById(R.id.i2);

    bu1.setOnClickListener(new View.OnClickListener() {

        public void onClick(View v) {
            // TODO Auto-generated method stub

            t1.setText(t1.getText()+" "+bu1.getText()); 

        }

    });

    bu2.setOnClickListener(new View.OnClickListener() {

                public void onClick(View v) {
                    // TODO Auto-generated method stub

                    t1.setText(t1.getText()+" "+bu2.getText()); 


                }

            });

    bu3.setOnClickListener(new View.OnClickListener() {

        public void onClick(View v) {
            // TODO Auto-generated method stub

            t1.setText(t1.getText()+" "+bu3.getText()); 

        }

    });

    bu4.setOnClickListener(new View.OnClickListener() {

        public void onClick(View v) {
            // TODO Auto-generated method stub


            t1.setText(t1.getText()+" "+bu4.getText()); 
        }

    });

    bu5.setOnClickListener(new View.OnClickListener() {

        public void onClick(View v) {
            // TODO Auto-generated method stub

        if(t1.getText().toString().equals("a b c d")) //this is not working
            {

                i1.setVisibility(View.VISIBLE);
                i2.setVisibility(View.INVISIBLE);
            }       

            else {
                i2.setVisibility(View.VISIBLE);
                i1.setVisibility(View.INVISIBLE);
            }
        }

    });


}
  

04-21 07:00:48.690:E / AndroidRuntime(23874):致命异常:主要   04-21 07:00:48.690:E / AndroidRuntime(23874):java.lang.RuntimeException:无法启动活动ComponentInfo {com.arabicalphabets.reham / com.arabicalphabets.reham.Wordgame2}:java.lang.NullPointerException   04-21 07:00:48.690:E / AndroidRuntime(23874):在android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1970)   04-21 07:00:48.690:E / AndroidRuntime(23874):在android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1995)   04-21 07:00:48.690:E / AndroidRuntime(23874):在android.app.ActivityThread.access $ 600(ActivityThread.java:127)   04-21 07:00:48.690:E / AndroidRuntime(23874):在android.app.ActivityThread $ H.handleMessage(ActivityThread.java:1161)   04-21 07:00:48.690:E / AndroidRuntime(23874):在android.os.Handler.dispatchMessage(Handler.java:99)   04-21 07:00:48.690:E / AndroidRuntime(23874):在android.os.Looper.loop(Looper.java:137)   04-21 07:00:48.690:E / AndroidRuntime(23874):在android.app.ActivityThread.main(ActivityThread.java:4512)   04-21 07:00:48.690:E / AndroidRuntime(23874):at java.lang.reflect.Method.invokeNative(Native Method)   04-21 07:00:48.690:E / AndroidRuntime(23874):at java.lang.reflect.Method.invoke(Method.java:511)   04-21 07:00:48.690:E / AndroidRuntime(23874):at com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:982)   04-21 07:00:48.690:E / AndroidRuntime(23874):at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:749)   04-21 07:00:48.690:E / AndroidRuntime(23874):at dalvik.system.NativeStart.main(Native Method)   04-21 07:00:48.690:E / AndroidRuntime(23874):引起:java.lang.NullPointerException   04-21 07:00:48.690:E / AndroidRuntime(23874):at com.arabicalphabets.reham.Wordgame2.onCreate(Wordgame2.java:36)   04-21 07:00:48.690:E / AndroidRuntime(23874):在android.app.Activity.performCreate(Activity.java:4465)   04-21 07:00:48.690:E / AndroidRuntime(23874):在android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1052)   04-21 07:00:48.690:E / AndroidRuntime(23874):在android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1934)   04-21 07:00:48.690:E / AndroidRuntime(23874):... 11更多

2 个答案:

答案 0 :(得分:0)

首先而不是声明每个按钮单独使用循环来声明它们......

Button[] buttons; 
for(int i=0; i<5; i++) {  //for your 5 buttons
{
 String buttonID = "bu" + (i+1);
 int resID = getResources().getIdentifier(buttonID, "id", getPackageName());
 buttons[i] = ((Button) findViewById(resID));
}

- 使用开关()找到点击的按钮......

- 并且在案例中实施onclick()如下

public void onClick(View v) {
        t1.setText(t1.getText().toString()+" "+buttons[i].getText().toString()); 
}

希望它有效

答案 1 :(得分:0)

我看不出它有什么问题,为什么它崩溃以及为什么if else声明不起作用...... ??

public class Wordgame2 extends Activity implements OnClickListener {

Button[] buttons; 
TextView t1;
ImageView i1, i2;
int i;
@Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setRequestedOrientation (ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
    // Full screen
    requestWindowFeature(Window.FEATURE_NO_TITLE);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, 
                             WindowManager.LayoutParams.FLAG_FULLSCREEN);

    setContentView(R.layout.wordgame2);

    for(int i=0; i<5; i++) {  
        {
         String buttonID = "bu" + (i+1);
         int resID = getResources().getIdentifier(buttonID, "id", getPackageName());
         buttons[i] = ((Button) findViewById(resID));
         buttons[i].setOnClickListener(this);
        }
        }
    t1 = (TextView) findViewById(R.id.t1);

    i1 = (ImageView) findViewById(R.id.i1);
    i2 = (ImageView) findViewById(R.id.i2);







}
public void onClick(View v) {
    // TODO Auto-generated method stub

    switch (v.getId()){

    case R.id.bu1:
        t1.setText(t1.getText().toString()+" "+buttons[i].getText().toString());
        break;

    case R.id.bu2:
        t1.setText(t1.getText().toString()+" "+buttons[i].getText().toString());
        break;

    case R.id.bu3:
        t1.setText(t1.getText().toString()+" "+buttons[i].getText().toString());
        break;

    case R.id.bu4:
        t1.setText(t1.getText().toString()+" "+buttons[i].getText().toString());
        break;

//当他们点击bu5时,如果t1正确为“a b c d”,它将显示图片

    case R.id.bu5:


        if(t1.getText().toString().equals("a b c d")) //this is not working
        {

            i1.setVisibility(View.VISIBLE);
            i2.setVisibility(View.INVISIBLE);
        }       

        else {
            i2.setVisibility(View.VISIBLE);
            i1.setVisibility(View.INVISIBLE);
        }

        break;

    }
}

}