Question

OnCreate中：

    public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    changingTextView = (TextView) findViewById(R.id.changingTextView);
    button1 = (Button) findViewById(R.id.button1);
    button1.setOnClickListener(this);
    button2 = (Button) findViewById(R.id.button2);
    button2.setOnClickListener(this);
    button3 = (Button) findViewById(R.id.button3);
    button3.setOnClickListener(this);
}

脚本：

    public void onClick(View v) {


        if(v.getId() == R.id.button1){
        PaintDrawable drawable = (PaintDrawable) button1.getBackground();
        int color = drawable.getPaint().getColor();
        if(color==Color.WHITE)
            changingTextView.setText("continue");
        else
            changingTextView.setText("gameOVER");   
        }
        if(v.getId() == R.id.button2){
            PaintDrawable drawable = (PaintDrawable) button2.getBackground();
            int color = drawable.getPaint().getColor();
            if(color==Color.WHITE)
            changingTextView.setText("continue");
        else
            changingTextView.setText("gameOVER");
    } 
        if(v.getId() == R.id.button3){
            PaintDrawable drawable = (PaintDrawable) button3.getBackground();
            int color = drawable.getPaint().getColor();
            if(color==Color.WHITE)
            changingTextView.setText("continue");
        else
            changingTextView.setText("gameOVER");
    }

here is the complete code+logcat image

main.xml中：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.bluetap.FirstActivity$PlaceholderFragment" >

<Button
    android:id="@+id/button1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:layout_alignParentTop="true"
    android:minWidth="200dp"
    android:text="Press The White Button"
    android:textColor="@color/blue" />

<Button
    android:id="@+id/button2"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignLeft="@+id/button1"
    android:layout_below="@+id/button1"
    android:background="@android:color/white"
    android:minWidth="200dp"
    android:text="Press The White Button"
    android:textColor="@color/blue" />

<Button
    android:id="@+id/button3"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignLeft="@+id/button2"
    android:layout_below="@+id/button2"
    android:minWidth="200dp"
    android:text="Press The White Button"
    android:textColor="@color/blue" />

<TextView
    android:id="@+id/changingTextView"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignLeft="@+id/button3"
    android:layout_centerVertical="true"
    android:text="text"
    android:textSize="20sp" />

在Eclipse中，此代码中没有错误，但是当我运行应用程序时，您可以看到所有内容，一切都很好但是当您按下按钮1/2/3时，应用程序崩溃。你能帮我找出原因吗？我的应用程序只需要识别按钮背景是否为白色，如果是，它将继续，如果没有，它将暂停并说游戏结束。

点击按钮，应用程序崩溃

0 个答案: