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Android中怎么通過自定義EditText實現登錄界面,很多新手對此不是很清楚,為了幫助大家解決這個難題,下面小編將為大家詳細講解,有這方面需求的人可以來學習下,希望你能有所收獲。
自定義edittext 控件,監聽focus和textchange 狀態 實現是否顯示刪除圖片。
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) { // 這個屬性不加 沒法用 this(context, attrs, android.R.attr.editTextStyle); } public ClearEditText(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); // 初始化刪除的資源圖片 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加上圖片占據的寬度 在這個范圍內 即判斷是否點擊了刪除按鈕 @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 } /** * 設置晃動動畫 */ public void setShakeAnimation() { this.setAnimation(shakeAnimation(5)); } // 可以設置1秒鐘晃動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; } }
自定義TextView 實現字體從上到下顯示:
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); //得到字體大小 int size = (int) getTextSize(); //轉換成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; //轉化為 單個字的字符串 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; } /**返回字體最長的寬度 * @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; } /**返回字體最高的高度 * @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坐標變化 float changeY = 0; for (int j = 0; j < num; j++) { //測量字體寬度和高度 measureText(strings[j]); //沒個字體上下的間隔 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); } } }
布局xml:
<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" android: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="帳號" /> <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="請輸入帳號" 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="密碼" /> <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="請輸入密碼" 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="登錄" /> <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="注冊" android:textSize="16sp" /> </RelativeLayout> </LinearLayout> </LinearLayout>
button_selector xml
<?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>
press:
<?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>
normal:
<?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>
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