查看ImageView是否等于输入点击

Question

我想创建一个 Android 应用程序（使用 Android Studio），用户可以借此看到我在数组中生成的随机图像。然后，他们必须 select 从与显示的随机图像相对应的水平滚动视图中获取正确的图像。但是，我似乎无法编写正确的代码来检查用户是否单击了正确的相应图像。我正在使用 if 语句。

这是我的 activity_main.xml:

<HorizontalScrollView
    android:layout_width="wrap_content"
    android:layout_height="205dp"
    android:layout_alignParentStart="true"
    android:layout_alignParentBottom="true"
    android:layout_marginBottom="54dp">

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content">

        <ImageView
            android:id="@+id/face_with_tears_of_joy"
            android:layout_width="50dp"
            android:layout_height="55dp"
            android:layout_marginLeft="5dp"
            android:contentDescription="@string/funny_emoji"
            android:onClick="clickedFaceWithTearsOfJoy"
            android:clickable="true"
            app:srcCompat="@drawable/face_with_tears_of_joy" />

        <ImageView
            android:id="@+id/grinning_face"
            android:layout_width="50dp"
            android:layout_height="55dp"
            android:layout_marginLeft="5dp"
            android:contentDescription="@string/funny_emoji"
            android:onClick="clickedGrinningFace"
            android:clickable="true"
            app:srcCompat="@drawable/grinning_face" />

        <ImageView
            android:id="@+id/grinning_face_with_smiling_eyes"
            android:layout_width="50dp"
            android:layout_height="55dp"
            android:layout_marginLeft="5dp"
            android:clickable="true"
            android:contentDescription="@string/funny_emoji"
            android:onClick="clickedGrinningFaceWithSmilingEyes"
            app:srcCompat="@drawable/grinning_face_with_smiling_eyes" />

        <ImageView
            android:id="@+id/rolling_on_the_floor_laughing"
            android:layout_width="50dp"
            android:layout_height="55dp"
            android:layout_marginLeft="5dp"
            android:contentDescription="@string/funny_emoji"
            app:srcCompat="@drawable/rolling_on_the_floor_laughing" />

        <ImageView
            android:id="@+id/smiling_face_with_open_mouth"
            android:layout_width="50dp"
            android:layout_height="55dp"
            android:layout_marginLeft="5dp"
            android:contentDescription="@string/funny_emoji"
            app:srcCompat="@drawable/smiling_face_with_open_mouth" />

        <ImageView
            android:id="@+id/smiling_face_with_open_mouth_and_cold_sweat"
            android:layout_width="50dp"
            android:layout_height="55dp"
            android:layout_marginLeft="5dp"
            android:contentDescription="@string/funny_emoji"
            app:srcCompat="@drawable/smiling_face_with_open_mouth_and_cold_sweat" />

        <ImageView
            android:id="@+id/smiling_face_with_open_mouth_and_smiling_eyes"
            android:layout_width="50dp"
            android:layout_height="55dp"
            android:layout_marginLeft="5dp"
            android:contentDescription="@string/funny_emoji"
            app:srcCompat="@drawable/smiling_face_with_open_mouth_and_smiling_eyes" />




    </LinearLayout>
</HorizontalScrollView>

这是我的 MainActivity.java:

public class MainActivity extends AppCompatActivity {

public ImageView imageView;
public Random random;
public TextView textView;
int easy[] = {R.drawable.face_with_tears_of_joy, R.drawable.grinning_face, R.drawable.grinning_face_with_smiling_eyes};
int hard[] = {R.drawable.face_with_tears_of_joy, R.drawable.grinning_face, R.drawable.grinning_face_with_smiling_eyes,
        R.drawable.rolling_on_the_floor_laughing, R.drawable.smiling_face_with_open_mouth, R.drawable.smiling_face_with_open_mouth_and_cold_sweat,
        R.drawable.smiling_face_with_open_mouth_and_smiling_eyes};
public ImageView imageView1;
public ImageView imageView2;
public ImageView imageView3;
public ImageView imageView4;
public ImageView imageView5;
public ImageView imageView6;
public ImageView imageView7;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    imageView1 = (ImageView) findViewById(R.id.face_with_tears_of_joy);
    imageView2 = (ImageView) findViewById(R.id.grinning_face);
    imageView3 = (ImageView) findViewById(R.id.grinning_face_with_smiling_eyes);
    imageView4 = (ImageView) findViewById(R.id.rolling_on_the_floor_laughing);
    imageView5 = (ImageView) findViewById(R.id.smiling_face_with_open_mouth);
    imageView6 = (ImageView) findViewById(R.id.smiling_face_with_open_mouth_and_cold_sweat);
    imageView7 = (ImageView) findViewById(R.id.smiling_face_with_open_mouth_and_smiling_eyes);
    imageView = (ImageView) findViewById(R.id.imageView);
    random = new Random();
    textView = (TextView) findViewById(R.id.textView);

    int randomInt = random.nextInt(hard.length);
    imageView.setBackgroundResource(hard[randomInt]);

}

    public void clickedEmoji(View view) {

        ImageView image = (ImageView) view;

        Bitmap clicked = ((BitmapDrawable) image.getDrawable()).getBitmap();
        Bitmap displayed = ((BitmapDrawable) image.getDrawable()).getBitmap();

        if (clicked == displayed) {
            textView.setText("Well Done!");
        } else {
            textView.setText("Unlucky!");
        }
    }

Answer 1

您必须要么实现 OnClickListener，要么将 OnClickListener 设置为您要检查的每张图像是否已被单击。检查此 link 可能会有帮助..

Answer 2

与其制作多个功能，不如将它们合而为一。此外，您创建的代码将 ImageView 与 Drawable 进行比较，这是无效的比较。相反，您可以执行以下操作。

public void clickedImage(View view) {
    ImageView image = (ImageView) view;
    Bitmap clicked = drawableToBitmap(image.getDrawable());
    Bitmap displayed = drawableToBitmap(imageView.getBackground());
    if (clicked == displayed) {
        textView.setText("Well Done!");
    } else {
        textView.setText("Unlucky!");
    }
}

public Bitmap drawableToBitmap(Drawable d) {
    Bitmap b = Bitmap.createBitmap(d.getIntrinsicWidth(), d.getIntrinsicHeight(), Bitmap.Config.ARGB_8888);
    Canvas c = new Canvas(b);
    d.setBounds(0, 0, c.getWidth(), c.getHeight());
    d.draw(c);
    return b;
}

然后，对于 XML 文件中的每个 ImageView，只需添加 android:onClick="clickedImage"。希望这对您有所帮助！

查看ImageView是否等于输入点击

Check to see if ImageView is equal to input click

java

arrays

android

if-statement

imageview