Android 自定义EditText（ 登录界面）

转载请标明出处：http://blog.csdn.net/u013598111/article/details/50071647，本文出自：【JunTao_sun】

先看效果图：



自定义edittext 控件，监听focus和textchange 状态 实现是否显示删除图片。

<span style="font-size:18px;">public class ClearEditText extends EditText implements OnFocusChangeListener,
TextWatcher {

private Drawable right;
private boolean hasfocus;
private Drawable mClearDrawable;

public ClearEditText(Context context) {
this(context, null);

}

public ClearEditText(Context context, AttributeSet attrs) {
// 这个属性不加 没法用
this(context, attrs, android.R.attr.editTextStyle);

}

public ClearEditText(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
// 初始化删除的资源图片
mClearDrawable = getCompoundDrawables()[2];
if (mClearDrawable == null) {
mClearDrawable = getResources().getDrawable(R.drawable.ic_close1);
}
mClearDrawable.setBounds(0, 0, mClearDrawable.getIntrinsicWidth(),
mClearDrawable.getIntrinsicHeight());

clearText(false);

setOnFocusChangeListener(this);
addTextChangedListener(this);

}

@Override
public void onFocusChange(View v, boolean hasfocus) {
this.hasfocus = hasfocus;
if (hasfocus) {
clearText(getText().length() > 0);
} else {
clearText(false);
}

}

@Override
public void onTextChanged(CharSequence text, int start, int lengthBefore,
int lengthAfter) {
// TODO Auto-generated method stub
if (hasfocus) {
clearText(text.length() > 0);
}

}

private void clearText(boolean visible) {
if (visible) {
right = mClearDrawable;

} else {
right = null;
}
setCompoundDrawables(getCompoundDrawables()[0],
getCompoundDrawables()[1], right, getCompoundDrawables()[3]);

// right.setBounds(0, 0, right.getIntrinsicWidth(),
// right.getIntrinsicHeight());

}

//getTotalPaddingRight 返回 又padding加上图片占据的宽度 在这个范围内 即判断是否点击了删除按钮
@Override
public boolean onTouchEvent(MotionEvent event) {
if (event.getAction() == MotionEvent.ACTION_UP) {
if (getCompoundDrawables()[2] != null) {

boolean t = event.getX() > (getWidth() - getTotalPaddingRight())
&& (event.getX() < ((getWidth() - getPaddingRight())));

if (t) {
this.setText("");
}
}
}

return super.onTouchEvent(event);
}

@Override
public void afterTextChanged(Editable arg0) {
// TODO Auto-generated method stub

}

@Override
public void beforeTextChanged(CharSequence arg0, int arg1, int arg2,
int arg3) {
// TODO Auto-generated method stub

}

/**
* 设置晃动动画
*/
public void setShakeAnimation() {
this.setAnimation(shakeAnimation(5));
}

// 可以设置1秒钟晃动s下
public static Animation shakeAnimation(int s) {
Animation translateAnimation = new TranslateAnimation(0, 10, 0, 0);
translateAnimation.setInterpolator(new CycleInterpolator(s));
translateAnimation.setDuration(1000);
return translateAnimation;
}

}
</span>自定义TextView 实现字体从上到下显示：

<span style="font-size:18px;">public class CustomText extends TextView {

private String text;
private Paint paint;
private Rect rect = new Rect();
private int initTopDistance = 8;

public CustomText(Context context) {
super(context, null);
// TODO Auto-generated constructor stub
}

public CustomText(Context context, AttributeSet attrs) {
this(context, attrs, 0);
// TODO Auto-generated constructor stub
}

public CustomText(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
text = (String) getText();

DisplayMetrics metric = new DisplayMetrics();
WindowManager windowmanager = (WindowManager) context
.getSystemService(Context.WINDOW_SERVICE);
windowmanager.getDefaultDisplay().getMetrics(metric);
//得到字体大小
int size = (int) getTextSize();
//转换成SP
int s= (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP, size, metric);

paint = new Paint(Paint.ANTI_ALIAS_FLAG);
paint.setDither(true);
paint.setColor(0xffffffff);
if(s!=0)
paint.setTextSize(s);
Typeface t= Typeface.createFromAsset(context.getResources().getAssets(), "fonts/font.TTF");

paint.setTypeface(t);
paint.setShadowLayer(60, 30, 30, 0xff00ffff);

}
// @Override
// protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
//
//// super.onMeasure(widthMeasureSpec, heightMeasureSpec);
// int modeWidth=MeasureSpec.getMode(widthMeasureSpec);
// int modeHeight=MeasureSpec.getMode(heightMeasureSpec);
// int widthSize=MeasureSpec.getSize(widthMeasureSpec);
// int heightSize=MeasureSpec.getSize(heightMeasureSpec);
//
// int width=0;
// int heigh=0;
// if(modeWidth==MeasureSpec.AT_MOST)
//
// width=getMaxTextWdith(getStrings())+getPaddingLeft()+getPaddingRight();
//
// if(modeHeight==MeasureSpec.AT_MOST)
// heigh=getMaxTextHeight(getStrings())+getPaddingTop()+getPaddingBottom();
//
// setMeasuredDimension(width=modeWidth==MeasureSpec.AT_MOST?width:widthSize,
// height=modeHeight==MeasureSpec.AT_MOST?height:heightSize);
//
//
// }

@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
// TODO Auto-generated method stub
super.onSizeChanged(w, h, oldw, oldh);
width = w;
height = h;
}

private void measureText(String str) {

paint.getTextBounds(str, 0, str.length(), rect);
FontMetrics fm = paint.getFontMetrics();
textHeight = (int) (fm.ascent + fm.descent);
}

private int textHeight;
private int width;
private int height;
private int num;
//转化为 单个字的字符串
public String[] getStrings(){

num = text.length();
String[] strings = new String[num];
for (int i = 0; i < num; i++) {

char c = text.charAt(i);
strings[i] = String.valueOf(c);
}
return strings;
}
/**返回字体最长的宽度
* @param strs
* @return
*/
public int getMaxTextWdith(String[] strs){
int w=0;
for(int i=0;i<strs.length;i++){
measureText(strs[i]);
w=Math.max(rect.width(), w);

}

return w;

}
/**返回字体最高的高度
* @param strs
* @return
*/
public int getMaxTextHeight(String[] strs){
int h=0;
for(int i=0;i<strs.length;i++){
measureText(strs[i]);

h=Math.max(-textHeight, h);

}
return h;

}

@Override
protected void onDraw(Canvas canvas) {

String[] strings=getStrings();

float starty = 1.0f * height / num;
//Y坐标变化
float changeY = 0;
for (int j = 0; j < num; j++) {
//测量字体宽度和高度
measureText(strings[j]);
//没个字体上下的间隔
changeY = starty * j;
int left=getWidth() / 2 - rect.width() / 2
+ getPaddingLeft() + getPaddingRight();
int top=(int) (starty/2-textHeight+ changeY + getPaddingTop() + getPaddingBottom());

canvas.drawText(strings[j], left, top, paint);
}

}

}
</span>布局xml：

<span style="font-size:18px;"><LinearLayout 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"
android:orientation="vertical" >

<RelativeLayout
android:id="@+id/meishi"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
and
4000
roid:background="@drawable/ic_meishi" >

<com.example.eidttext.CustomText
android:id="@+id/tttt"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_alignParentRight="true"
android:text="味道"
android:textSize="40sp"
/>
</RelativeLayout>

<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:orientation="vertical" >

<RelativeLayout
android:id="@+id/count"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:padding="8dp"
android:gravity="center"
android:layout_marginTop="20dp"
>

<TextView
android:id="@+id/text_count"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="8dp"
android:text="帐号"

/>

<com.example.eidttext.ClearEditText

android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginRight="20dp"
android:layout_toRightOf="@+id/text_count"
android:background="@drawable/edittext"
android:drawableRight="@drawable/ic_close1"
android:gravity="center_vertical"
android:hint="请输入帐号"
android:textSize="16sp"
android:padding="8dp"

android:singleLine="true" >
</com.example.eidttext.ClearEditText>
</RelativeLayout>

<RelativeLayout
android:id="@+id/password"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:padding="8dp"

>

<TextView
android:id="@+id/text_password"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="8dp"
android:text="密码" />

<com.example.eidttext.ClearEditText
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginRight="20dp"
android:layout_toRightOf="@+id/text_password"
android:background="@drawable/edittext"
android:drawableRight="@drawable/ic_close1"
android:gravity="center_vertical"
android:hint="请输入密码"
android:padding="8dp"
android:textSize="16sp"
android:singleLine="true" >
</com.example.eidttext.ClearEditText>
</RelativeLayout>

<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="16dp" >

<Button
android:id="@+id/login"
android:layout_width="wrap_content"
android:layout_height="30dp"
android:layout_marginLeft="50dp"
android:textSize="16sp"
android:background="@drawable/button_selector"
android:text="登录"

/>

<Button
android:layout_width="wrap_content"
android:layout_height="30dp"
android:layout_marginLeft="80dp"
android:layout_toRightOf="@+id/login"
android:background="@drawable/button_selector"
android:text="注册"
android:textSize="16sp" />
</RelativeLayout>
</LinearLayout>

</LinearLayout></span>button_selector   xml

<span style="font-size:18px;"><?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android" >
<item android:state_pressed="true"
android:drawable="@drawable/button_press" />"
<item android:drawable="@drawable/button" />

</selector>
</span>press:

<span style="font-size:18px;"><?xml version="1.0" encoding="utf-8"?>

<shape android:shape="rectangle"
xmlns:android="http://schemas.android.com/apk/res/android">
<gradient
android:startColor="@color/deep_red"
android:centerColor="#ffffffff"
android:endColor="@color/oranger_red"
android:angle="90"

>
</gradient>
<corners android:radius="15dp" />
<stroke android:width="1px"
android:color="#FF6666"/>

</shape>

</span>

normal:

<span style="font-size:18px;"><?xml version="1.0" encoding="utf-8"?>

<shape android:shape="rectangle"
xmlns:android="http://schemas.android.com/apk/res/android">
<gradient
android:startColor="#FF3333"
android:centerColor="#ffffffff"
android:endColor="#FF9966"
android:angle="90"

>
</gradient>
<corners android:radius="15dp" />
<stroke android:width="1px"
android:color="#ededed"/>

</shape>

</span>