[英]Show the toast before fragment start
我是Android的初学者,正在尝试编写一个简单的应用程序。 当进入片段时,单击按钮启动另一个片段,为此:
@Override
public void onClick(View v) {
new Handler(Looper.getMainLooper()).post(new Runnable() {
@Override
public void run() {
Toast.makeText(getActivity(), "Hello", Toast.LENGTH_SHORT).show();
FragmentTransaction transaction = getActivity().getSupportFragmentManager().beginTransaction();
secondFragment.removeAllViews();
transaction.replace(R.id.secondFragment, new DashBoardFragment());
transaction.commit();
}
});
}
但是在其他片段开始之后显示Hello Toast,但是我想在片段开始之前显示。
toasting
后在onClick
尝试:
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
FragmentTransaction transaction = getActivity().getSupportFragmentManager().beginTransaction();
secondFragment.removeAllViews();
transaction.replace(R.id.secondFragment, new DashBoardFragment());
transaction.commit();
}
}, Toast.LENGTH_SHORT);
您的片段事务将在1500毫秒后发生( 因此,吐司消息将在事务发生前弹出 )
您的完全点击方法...
@Override
public void onClick(View v) {
Toast.makeText(getActivity(), "Hello", Toast.LENGTH_SHORT).show();
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
FragmentTransaction transaction = getActivity().getSupportFragmentManager().beginTransaction();
secondFragment.removeAllViews();
transaction.replace(R.id.secondFragment, new DashBoardFragment());
transaction.commit();
}
}, Toast.LENGTH_SHORT);
}
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