正文
一、實現效果
二、實現代碼
監聽輸入
/**
* 動態搜索
*/
private TextWatcher tbxSearch_TextChanged = new TextWatcher() {
//緩存上一次文本框內是否為空
private boolean isnull = true;
@Override
public void afterTextChanged(Editable s) {
if (TextUtils.isEmpty(s)) {
if (!isnull) {
mSearchView.setCompoundDrawablesWithIntrinsicBounds(null,
null, mIconSearchDefault, null);
isnull = true;
}
} else {
if (isnull) {
mSearchView.setCompoundDrawablesWithIntrinsicBounds(null,
null, mIconSearchClear, null);
isnull = false;
}
}
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
}
/**
* 隨著文本框內容改變動態改變列表內容
*/
@Override
public void onTextChanged(CharSequence s, int start, int before,
int count) {
}
};
觸摸事件
private OnTouchListener txtSearch_OnTouch = new OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_UP:
int curX = (int) event.getX();
if (curX > v.getWidth() - 38
&& !TextUtils.isEmpty(mSearchView.getText())) {
mSearchView.setText("");
int cacheInputType = mSearchView.getInputType();// backup the input type
mSearchView.setInputType(InputType.TYPE_NULL);// disable soft input
mSearchView.onTouchEvent(event);// call native handler
mSearchView.setInputType(cacheInputType);// restore input type
return true;// consume touch even
}
break;
}
return false;
}
};
綁定事件
private Drawable mIconSearchDefault; // 搜索文本框默認圖標
private Drawable mIconSearchClear; // 搜索文本框清除文本內容圖標
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main)
final Resources res = getResources();
mIconSearchDefault = res.getDrawable(R.drawable.txt_search_default);
mIconSearchClear = res.getDrawable(R.drawable.txt_search_clear);
mSearchView = (EditText) findViewById(R.id.txtSearch);
mSearchView.addTextChangedListener(tbxSearch_TextChanged);
mSearchView.setOnTouchListener(txtSearch_OnTouch);
}
代碼說明:
1. 為輸入框綁定觸摸事件(模擬點擊事件捕捉)。通過監聽點擊區域判斷是否點擊清空圖片,如果在該區域並且文本框不為空,則清空文本框。
2. 為輸入框綁定文本改變事件監聽,根據內容改變動態設置圖標顯示。
3. 維持清空操作後軟鍵盤狀態。