一樣的，V4包，eclipse上開發，筆者是根據一位叫做yayun0516的博主進行學習以及實現，除此之外再發表自己的一些見解以及增加合適的備註。 這個想法最近另筆者特別好奇以及羨慕，自定義控件的熟悉使用應該對一名Android開發者有較高的資歷和能力要求，再加上與屬性動畫的使用，更是大大的提高了用戶的體驗度，嗯，廢話不多說，貼代碼和效果圖~
MineActivity.java類，也就是重寫EditText,
public class MineActivity extends EditText {
private Drawable mRightDrawable;
private Boolean isHasFocus;
public MineActivity(Context context) {
// 回調父類方法
super(context);
initView();
}
// AttributeSet用來完成控件類構造函數，並在構造函數中將自定義控件類中變量與attrs.xml中的屬性連接起來
public MineActivity(Context context, AttributeSet attributeSet) {
super(context, attributeSet);
initView();
}
public MineActivity(Context context, AttributeSet attributeSet, int defstyle) {
super(context, attributeSet, defstyle);
initView();
}
private void initView() {
// Returns drawables for the left, top, right, and bottom borders.
Drawable[] drawables = this.getCompoundDrawables();
// 取得right位置的Drawable
// 即我們在佈局文件中設置的android:drawableRight
mRightDrawable = drawables[2];
// 焦點變化監聽
this.setOnFocusChangeListener(new FocusChangeListenerImpl());
// 設置文字變化監聽
this.addTextChangedListener(new TextWatcherImpl());
// 初始化時讓右邊clean圖標不可見
setClearDrawableVisible(false);
}
private class FocusChangeListenerImpl implements OnFocusChangeListener {
public void onFocusChange(View v, boolean hasFocus) {
isHasFocus = hasFocus;
if (isHasFocus) {
boolean isVisible = getText().toString().length() >= 1;
setClearDrawableVisible(isVisible);
} else {
setClearDrawableVisible(false);
}
}
}
// 當輸入結束後判斷是否顯示右邊clean的圖標，一樣的焦點判斷
private class TextWatcherImpl implements TextWatcher {
public void afterTextChanged(Editable s) {
boolean isVisible = getText().toString().length() >= 1;
setClearDrawableVisible(isVisible);
}
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
}
public void onTextChanged(CharSequence s, int start, int before,
int count) {
}
}
// 隱藏或顯示右邊clean的圖標，很簡單的焦點判斷
protected void setClearDrawableVisible(boolean isVisible) {
Drawable rightDrawable;
if (isVisible) {
rightDrawable = mRightDrawable;
} else {
rightDrawable = null;
}
// 使用代碼設置該控件left, top, right, and bottom處的圖標
setCompoundDrawables(getCompoundDrawables()[0],
getCompoundDrawables()[1], rightDrawable,
getCompoundDrawables()[3]);
}
// 顯示動畫
public void setShakeAnimation() {
//調用shakeAnimation
this.startAnimation(shakeAnimation(5));
}
// CycleTimes動畫重複的次數
public Animation shakeAnimation(int CycleTimes) {
//移動位置
Animation translateAnimation = new TranslateAnimation(0, 10, 0, 10);
translateAnimation.setInterpolator(new CycleInterpolator(CycleTimes));
//重複時間
translateAnimation.setDuration(500);
return translateAnimation;
}
}MainActivity.java:
public class MainActivity extends Activity {
private MineActivity usernameDeletableEditText;
private MineActivity passwordDeletableEditText;
private Button btn_logButton;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
usernameDeletableEditText=(MineActivity)findViewById(R.id.det_test);
passwordDeletableEditText=(MineActivity)findViewById(R.id.user_password_input);
btn_logButton=(Button)findViewById(R.id.btn_login);
btn_logButton.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
String string1=usernameDeletableEditText.getText().toString();
String string2=passwordDeletableEditText.getText().toString();
if(TextUtils.isEmpty(string1)){
usernameDeletableEditText.setShakeAnimation();//設置動畫
}else if(TextUtils.isEmpty(string2)){
passwordDeletableEditText.setShakeAnimation();//設置動畫
}
}
});
}
}<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity" >
<TextView
android:id="@+id/title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:gravity="center"
android:text="登 錄"
android:textSize="25sp" />
<com.jw.try_item1.MineActivity
android:id="@+id/det_test"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/title"
android:layout_margin="20dp"
android:drawableLeft="@drawable/login_icon_user_f"
android:drawableRight="@drawable/login_icon_user_f"
android:ems="10"
android:hint="請輸入帳號名" />
<com.jw.try_item1.MineActivity
android:id="@+id/user_password_input"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/det_test"
android:layout_margin="20dp"
android:layout_marginTop="10dp"
android:drawableLeft="@drawable/login_icon_password_f"
android:drawableRight="@drawable/login_icon_password_f"
android:ems="10"
android:hint="請輸入密碼"
android:inputType="textPassword"
android:singleLine="true" />
<Button
android:id="@+id/btn_login"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/user_password_input"
android:layout_margin="20dp"
android:gravity="center"
android:text="Login" />
</RelativeLayout>不會製作gif動畫~直接貼工程吧~
