我想實現位圖到surfaceview並嘗試按鈕編輯圖像時單擊它。但有一個問題。當我在模擬器上運行它時,所有的都是正確的,直到按下按鈕。 「不幸的是,......停止..」出現在屏幕上,程序被迫關閉。請幫我弄明白。非常感謝你。Android:SurfaceView OnClick「不幸的是,.....停止..」
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_effect_ver1);
SurfaceView surfaceView01 = (SurfaceView) findViewById(R.id.surfaceView1);
btn1 = (Button) findViewById(R.id.button1);
btn2 = (Button) findViewById(R.id.button2);
btn3 = (Button) findViewById(R.id.button3);
res = getResources();
bmpDraw =(BitmapDrawable) res.getDrawable(R.drawable.images);
bmp =bmpDraw.getBitmap();
我想刪除這個Onclick方法。但我怎麼能聲明surfaceView =(SurfaceView)v;沒有視圖v,並將其移動到Oncreat?
surfaceView01.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
surfaceView = (SurfaceView)v;
canvas = surfaceView.getHolder().lockCanvas();
Paint paint =new Paint();
canvas.drawColor(Color.BLACK);
canvas.drawBitmap(bmp, 50, 150, paint);
surfaceView.getHolder().unlockCanvasAndPost(canvas);
}
});
這裏是logcat的
12-17 17:24:26.490: E/AndroidRuntime(583): FATAL EXCEPTION: main
12-17 17:24:26.490: E/AndroidRuntime(583): java.lang.ClassCastException: android.widget.Button cannot be cast to android.view.SurfaceView
12-17 17:24:26.490: E/AndroidRuntime(583): at com.example.effect_ver1.Effect_ver1$2.onClick(Effect_ver1.java:61)
12-17 17:24:26.490: E/AndroidRuntime(583): at android.view.View.performClick(View.java:3480)
12-17 17:24:26.490: E/AndroidRuntime(583): at android.view.View$PerformClick.run(View.java:13983)
12-17 17:24:26.490: E/AndroidRuntime(583): at android.os.Handler.handleCallback(Handler.java:605)
12-17 17:24:26.490: E/AndroidRuntime(583): at android.os.Handler.dispatchMessage(Handler.java:92)
12-17 17:24:26.490: E/AndroidRuntime(583): at android.os.Looper.loop(Looper.java:137)
12-17 17:24:26.490: E/AndroidRuntime(583): at android.app.ActivityThread.main(ActivityThread.java:4340)
12-17 17:24:26.490: E/AndroidRuntime(583): at java.lang.reflect.Method.invokeNative(Native Method)
12-17 17:24:26.490: E/AndroidRuntime(583): at java.lang.reflect.Method.invoke(Method.java:511)
12-17 17:24:26.490: E/AndroidRuntime(583): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
12-17 17:24:26.490: E/AndroidRuntime(583): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
12-17 17:24:26.490: E/AndroidRuntime(583): at dalvik.system.NativeStart.main(Native Method)
佈局'activity_effect_ver1'的'surfaceView1'和'button1'是否是唯一的?或者您是否在其他佈局中重複使用這些名稱? – Woodsy