Android 如何在用户暂停/离开编辑文本区域时检查验证
这里我描述了在用户离开edittext焦点时检查验证的代码Android 如何在用户暂停/离开编辑文本区域时检查验证,android,Android,这里我描述了在用户离开edittext焦点时检查验证的代码 TextWatcher tw = new TextWatcher() { @Override public void beforeTextChanged(CharSequence s, int start, int count, int after) { } @Override public void onTextChanged(CharSequence s, i
TextWatcher tw = new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) { }
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
// Check Condition
} else {
//检查条件
}
}
@Override
public void afterTextChanged(Editable s) { }
};
// text watcher registration to the 2 EditText
etEmail.addTextChangedListener(tw);
etPassword.addTextChangedListener(tw);
etUserName.addTextChangedListener(tw);
您可以在活动的onCreate方法中的EditText上注册OnFocusChangeListener:
final EditText et = (EditText)findViewById(R.id.my_edit_text);
et.setOnFocusChangeListener(new View.OnFocusChangeListener()
{
@Override
public void onFocusChange(View v, boolean hasFocus)
{
if (!hasFocus)
// TODO: the editText has just been left
}
});
这里onFocusChange的v参数是您的EditText控件。这里是一个示例
edittext.setOnFocusChangeListener(new OnFocusChangeListener() {
@Override
public void onFocusChange(View v, boolean hasFocus) {
if(hasFocus){
Toast.makeText(getApplicationContext(), "Got the focus", Toast.LENGTH_LONG).show();
}else {
Toast.makeText(getApplicationContext(), "Lost the focus", Toast.LENGTH_LONG).show();
}
}
});
您提供的代码不用于从edittext保留焦点。如果要检查edittext的焦点,请使用
yourEditText.setOnFocusChangeListener
如何管理它。。。你能给我一个足够的演示项目吗。。。