在我的android代码中，我的要求是：-
当我单击该按钮时，它将显示一个动画。此动画将运行4秒钟。然后它将转到另一个活动。
我的代码是：-
public class Animation_test extends Activity {
private Handler handler;
Context context;
private TransparentProgressDialog pd;
Button btnOpenPopup;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.animation_test);
btnOpenPopup = (Button)findViewById(R.id.btn1);
buttonperform();
handler = new Handler();
pd = new TransparentProgressDialog(this, R.drawable.uktrafficlights);
}
public void buttonperform(){
btnOpenPopup.setOnClickListener(new Button.OnClickListener(){
@Override
public void onClick(View arg0) {
new Thread(new Task()).start();
}
});
}
class Task implements Runnable {
@Override
public void run() {
handler.post(new Runnable() {
@Override
public void run() {
pd.show();
}
Intent intent = new Intent(context, secondActivity.class);
startActivity(intent);
});
}
}
@Override
protected void onDestroy() {
//handler.removeCallbacks(new Ru);
if (pd.isShowing() ) {
pd.dismiss();
}
super.onDestroy();
}
private class TransparentProgressDialog extends Dialog {
private ImageView iv;
public TransparentProgressDialog(Context context, int resourceIdOfImage) {
super(context, R.style.TransparentProgressDialog);
WindowManager.LayoutParams wlmp = getWindow().getAttributes();
wlmp.gravity = Gravity.CENTER_HORIZONTAL;
getWindow().setAttributes(wlmp);
setTitle(null);
setCancelable(false);
setOnCancelListener(null);
LinearLayout layout = new LinearLayout(context);
layout.setOrientation(LinearLayout.VERTICAL);
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);
iv = new ImageView(context);
iv.setImageResource(resourceIdOfImage);
layout.addView(iv, params);
addContentView(layout, params);
}
@Override
public void show() {
super.show();
RotateAnimation anim = new RotateAnimation(0.0f, 360.0f , Animation.RELATIVE_TO_SELF, .5f, Animation.RELATIVE_TO_SELF, .5f);
anim.setInterpolator(new LinearInterpolator());
//anim.setRepeatCount(Animation.INFINITE);
anim.setDuration(4000);
iv.setAnimation(anim);
iv.startAnimation(anim);
}
}
}
但是我的代码仅显示动画..问题出在哪里？
最佳答案
不需要处理程序和线程即可实现。动画有一个监听器Animation.AnimationListener，带有三个回调。
onAnimationStart
onAnimationEnd
onAnimationRepeat
您可以为动画注册侦听器，并在调用onAnimationEnd时开始活动。例如
anim.setAnimationListener(new Animation.AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {
}
@Override
public void onAnimationEnd(Animation animation) {
Intent intent = new Intent(Animation_test.this, secondActivity.class);
startActivity(intent);
}
@Override
public void onAnimationRepeat(Animation animation) {
}
});
关于java - 在Android中如何处理Runnable Handler类，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/28760269/