按下按钮不被听众抓住

时间:2018-08-21 08:00:37

标签: android event-capturing

第一次按下“编辑信息”按钮时,什么都没有发生,但随后的几次都很好。有很多类似的问题,我已经彻底尝试了一切,但都没有成功。

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        sharedPrefs = getSharedPreferences(USER_PREFERENCES, MODE_PRIVATE);
    //call function to load previous values, no intteraction with button



        final Button myButton = findViewById(R.id.button);
        myButton.setTag(1);
        myButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                final int status =(Integer) v.getTag();
                if(status == 1) {
                    myButton.setText(getString(R.string.edit_info));
                    setEditable(false);
                    v.setTag(0);
                } else {
                    myButton.setText(getString(R.string.save_info));
                    setEditable(true);
                    v.setTag(1);
                }
            }

        });
       //proposed solution from other question, see note bellow (*)    
        myButton.setOnTouchListener(new View.OnTouchListener() {

            @Override
            public boolean onTouch(View v, MotionEvent event) {
                if (event.getAction() == MotionEvent.ACTION_UP && !v.hasFocus()) {
                    // onClick() is not called when the EditText doesn't have focus,
                    // onFocusChange() is called instead, which might have a different
                    // meaning. This condition calls onClick() when click was performed
                    // but wasn't reported. Condition can be extended for v.isClickable()
                    // or v.isEnabled() if needed. Returning false means that everything
                    // else behaves as before.
                    myButton.performClick();
                }
                return false;
            }
        });
    }

(*)来自this question,MatějHrazdíra建议添加OnTouchListner,但这样做会使按钮永不回退。

这是activity_main.xml

<Button
    android:id="@+id/button"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:clickable="true"
    android:focusable="false"
    android:focusableInTouchMode="false"
    android:text="@string/edit_info" />

1 个答案:

答案 0 :(得分:1)

在xml中,按钮已经具有文本"@string/edit_info"
onCreate()中,将其标记设置为1。这样,侦听器将执行:

            myButton.setText(getString(R.string.edit_info));
            setEditable(false);
            v.setTag(0);

因此文本不会更改。
之后,随后的单击将更改其文本。
我不知道您到底想要什么,但是如果在onCreate()中将其标记设置为0,则从第一次点击起您就会看到变化。