android EditText输入变化事件详解
editText.addTextChangedListener(new TextWatcher(){
public void afterTextChanged(Editable s) {
// TODO Auto-generated method stub
//s:变化后的所有字符
Toast.makeText(getApplicationContext(), "变化:"+s, Toast.LENGTH_SHORT).show();
}
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
// TODO Auto-generated method stub
//s:变化前的所有字符; start:字符开始的位置; count:变化前的总字节数;after:变化后的字节数
Toast.makeText(getApplicationContext(), "变化前:"+s+";"+start+";"+count+";"+after, Toast.LENGTH_SHORT).show();
}
public void onTextChanged(CharSequence s, int start, int before,
int count) {
// TODO Auto-generated method stub
//S:变化后的所有字符;start:字符起始的位置;before: 变化之前的总字节数;count:变化后的字节数
Toast.makeText(getApplicationContext(), "变化后:"+s+";"+start+";"+before+";"+count, Toast.LENGTH_SHORT).show();
}
});