android弧形

1. android 弧形文字怎麼實現

因為你描述的不夠清楚，我只能按照自己的理解寫了下。比較粗糙，而且因為用到了差值動畫，所以適用於3.0以上的android系統，你給自己的TextView或EditText添加個文字改變監聽，例如： 你的文本控制項.addTextChangedListener(new TextWatcher(){});然後重寫onTextChangedfang方法，在裡面調用下面的方法就行了。裡面的效果我暫時寫死了，你可以根據需要自己修改參數。 private void changeTextAlpha(final TextView target){ final int color = target.getCurrentTextColor(); target.setTextColor(0 * 0x1000000 + color); //設置起始與結束值（透明度），從0到255漸變 ValueAnimator valueAnimator = ValueAnimator.ofInt(0, 255); valueAnimator.setEvaluator(new IntEvaluator()); //設置插值器，線性（勻速）漸變 valueAnimator.setInterpolator(new LinearInterpolator()); valueAnimator.addUpdateListener(new AnimatorUpdateListener() { @Override public void onAnimationUpdate(ValueAnimator animator) { int alpha = (Integer)animator.getAnimatedValue(); target.setTextColor(alpha * 0x1000000 + color); } }); //持續時間3秒 valueAnimator.setDuration(3000).start(); }

2. 安卓主題圖標怎麼設置成弧形的

很簡單的，只需要在原主題包icon中增加一個遮罩就可以實現了。

遮罩的用處就是讓其他未單獨做圖標的程序，顯示出和主題風格相近或者類似的效果。

注意觀察的話，下面一張圖的四周是一個邊框的，實際就是主題的遮罩， 任何一個第三方的程序都會應用此遮罩效果。

因為不知道你做的什麼主題，這里也不詳細說了。 建議你解包別人的主題文件查看一下就明白了。

3. 求教 android半圓弧形的進度條問題

package com.example.roundprogressbar;import android.content.Context;import android.content.res.TypedArray;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.graphics.RectF;import android.graphics.Typeface;import android.util.AttributeSet;import android.util.Log;import android.view.View;import com.example.circlepregress.R;/** * 仿iphone帶進度的進度條，線程安全的View，可直接在線程中更新進度 * @author xiaanming * */public class RoundProgressBar extends View {/*** 畫筆對象的引用*/private Paint paint;/*** 圓環的顏色*/private int roundColor;/*** 圓環進度的顏色*/private int roundProgressColor;/*** 中間進度百分比的字元串的顏色*/private int textColor;/*** 中間進度百分比的字元串的字體*/private float textSize;/*** 圓環的寬度*/private float roundWidth;/*** 最大進度*/private int max;/*** 當前進度*/private int progress;/*** 是否顯示中間的進度*/private boolean textIsDisplayable;/*** 進度的風格，實心或者空心*/private int style;public static final int STROKE = 0;public static final int FILL = 1;public RoundProgressBar(Context context) {this(context, null);}public RoundProgressBar(Context context, AttributeSet attrs) {this(context, attrs, 0);}public RoundProgressBar(Context context, AttributeSet attrs, int defStyle) {super(context, attrs, defStyle);paint = new Paint();TypedArray mTypedArray = context.obtainStyledAttributes(attrs,R.styleable.RoundProgressBar);//獲取自定義屬性和默認值roundColor = mTypedArray.getColor(R.styleable.RoundProgressBar_roundColor, Color.RED);roundProgressColor = mTypedArray.getColor(R.styleable.RoundProgressBar_roundProgressColor, Color.GREEN);textColor = mTypedArray.getColor(R.styleable.RoundProgressBar_textColor, Color.GREEN);textSize = mTypedArray.getDimension(R.styleable.RoundProgressBar_textSize, 15);roundWidth = mTypedArray.getDimension(R.styleable.RoundProgressBar_roundWidth, 5);max = mTypedArray.getInteger(R.styleable.RoundProgressBar_max, 100);textIsDisplayable = mTypedArray.getBoolean(R.styleable.RoundProgressBar_textIsDisplayable, true);style = mTypedArray.getInt(R.styleable.RoundProgressBar_style, 0);mTypedArray.recycle();}@Overrideprotected void onDraw(Canvas canvas) {super.onDraw(canvas);/*** 畫最外層的大圓環*/int centre = getWidth()/2; //獲取圓心的x坐標int radius = (int) (centre - roundWidth/2); //圓環的半徑paint.setColor(roundColor); //設置圓環的顏色paint.setStyle(Paint.Style.STROKE); //設置空心paint.setStrokeWidth(roundWidth); //設置圓環的寬度paint.setAntiAlias(true); //消除鋸齒 canvas.drawCircle(centre, centre, radius, paint); //畫出圓環Log.e("log", centre + "");/*** 畫進度百分比*/paint.setStrokeWidth(0); paint.setColor(textColor);paint.setTextSize(textSize);paint.setTypeface(Typeface.DEFAULT_BOLD); //設置字體int percent = (int)(((float)progress / (float)max) * 100); //中間的進度百分比，先轉換成float在進行除法運算，不然都為0float textWidth = paint.measureText(percent + "%"); //測量字體寬度，我們需要根據字體的寬度設置在圓環中間if(textIsDisplayable && percent != 0 && style == STROKE){canvas.drawText(percent + "%", centre - textWidth / 2, centre + textSize/2, paint); //畫出進度百分比}/*** 畫圓弧 ，畫圓環的進度*///設置進度是實心還是空心paint.setStrokeWidth(roundWidth); //設置圓環的寬度paint.setColor(roundProgressColor); //設置進度的顏色RectF oval = new RectF(centre - radius, centre - radius, centre+ radius, centre + radius); //用於定義的圓弧的形狀和大小的界限switch (style) {case STROKE:{paint.setStyle(Paint.Style.STROKE);canvas.drawArc(oval, 0, 360 * progress / max, false, paint); //根據進度畫圓弧break;}case FILL:{paint.setStyle(Paint.Style.FILL_AND_STROKE);if(progress !=0)canvas.drawArc(oval, 0, 360 * progress / max, true, paint); //根據進度畫圓弧break;}}}public synchronized int getMax() {return max;}/*** 設置進度的最大值* @param max*/public synchronized void setMax(int max) {if(max max){progress = max;}if(progress <= max){this.progress = progress;postInvalidate();}}public int getCricleColor() {return roundColor;}public void setCricleColor(int cricleColor) {this.roundColor = cricleColor;}public int getCricleProgressColor() {return roundProgressColor;}public void setCricleProgressColor(int cricleProgressColor) {this.roundProgressColor = cricleProgressColor;}public int getTextColor() {return textColor;}public void setTextColor(int textColor) {this.textColor = textColor;}public float getTextSize() {return textSize;}public void setTextSize(float textSize) {this.textSize = textSize;}public float getRoundWidth() {return roundWidth;}public void setRoundWidth(float roundWidth) {this.roundWidth = roundWidth;}}package com.example.roundprogressbar;import android.app.Activity;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import com.example.circlepregress.R;public class MainActivity extends Activity {private RoundProgressBar mRoundProgressBar1, mRoundProgressBar2 ,mRoundProgressBar3, mRoundProgressBar4, mRoundProgressBar5;private int progress = 0;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_cricle_progress);mRoundProgressBar1 = (RoundProgressBar) findViewById(R.id.roundProgressBar1);mRoundProgressBar2 = (RoundProgressBar) findViewById(R.id.roundProgressBar2);mRoundProgressBar3 = (RoundProgressBar) findViewById(R.id.roundProgressBar3);mRoundProgressBar4 = (RoundProgressBar) findViewById(R.id.roundProgressBar4);mRoundProgressBar5 = (RoundProgressBar) findViewById(R.id.roundProgressBar5);((Button)findViewById(R.id.button1)).setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {new Thread(new Runnable() {@Overridepublic void run() {while(progress <= 100){progress += 3;System.out.println(progress);mRoundProgressBar1.setProgress(progress);mRoundProgressBar2.setProgress(progress);mRoundProgressBar3.setProgress(progress);mRoundProgressBar4.setProgress(progress);mRoundProgressBar5.setProgress(progress);try {Thread.sleep(100);} catch (InterruptedException e) {e.printStackTrace();}}}}).start();}});}}activity_cricle_progress.xml剛好做過，通過復寫oncanvas實現的求教 android半圓弧形的進度條問題