Android 自定义Dialog 实例

public class LVCircularRing extends View {private float mWidth = 0f;private float mPadding = 0f;private float startAngle = 0f;private Paint mPaint;public LVCircularRing(Context context) { this(context, null);}public LVCircularRing(Context context, AttributeSet attrs) { this(context, attrs, 0);}public LVCircularRing(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); initPaint();}@Overrideprotected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { super.onMeasure(widthMeasureSpec, heightMeasureSpec); if (getMeasuredWidth() > getHeight())  mWidth = getMeasuredHeight(); else  mWidth = getMeasuredWidth(); mPadding = 5;}@Overrideprotected void onDraw(Canvas canvas) { super.onDraw(canvas); mPaint.setColor(Color.argb(100, 255, 255, 255)); canvas.drawCircle(mWidth / 2, mWidth / 2, mWidth / 2 - mPadding, mPaint); mPaint.setColor(Color.WHITE); RectF rectF = new RectF(mPadding, mPadding, mWidth - mPadding, mWidth - mPadding); canvas.drawArc(rectF, startAngle, 100   , false, mPaint);//第四个参数是否显示半径}private void initPaint() { mPaint = new Paint(); mPaint.setAntiAlias(true); mPaint.setStyle(Paint.Style.STROKE); mPaint.setColor(Color.WHITE); mPaint.setStrokeWidth(8);}public void startAnim() { stopAnim(); startViewAnim(0f, 1f, 1000);}public void stopAnim() { if (valueAnimator != null) {  clearAnimation();  valueAnimator.setRepeatCount(1);  valueAnimator.cancel();  valueAnimator.end(); }}ValueAnimator valueAnimator;private ValueAnimator startViewAnim(float startF, final float endF, long time) { valueAnimator = ValueAnimator.ofFloat(startF, endF); valueAnimator.setDuration(time); valueAnimator.setInterpolator(new LinearInterpolator()); valueAnimator.setRepeatCount(ValueAnimator.INFINITE);//无限循环 valueAnimator.setRepeatMode(ValueAnimator.RESTART);// valueAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {  @Override  public void onAnimationUpdate(ValueAnimator valueAnimator) {   float value = (float) valueAnimator.getAnimatedValue();   startAngle = 360 * value;   invalidate();  } }); valueAnimator.addListener(new AnimatorListenerAdapter() {  @Override  public void onAnimationEnd(Animator animation) {   super.onAnimationEnd(animation);  } }); if (!valueAnimator.isRunning()) {  valueAnimator.start(); } return valueAnimator;}}

public class LoadingDialog {LVCircularRing mLoadingView;Dialog mLoadingDialog;public LoadingDialog(Context context,String msg) { // 首先得到整个View View view = LayoutInflater.from(context).inflate(   R.layout.loading_dialog_view, null); // 获取整个布局 LinearLayout layout = (LinearLayout) view.findViewById(R.id.dialog_view); // 页面中的LoadingView mLoadingView = (LVCircularRing) view.findViewById(R.id.lv_circularring); // 页面中显示文本 TextView loadingText = (TextView) view.findViewById(R.id.loading_text); // 显示文本 loadingText.setText(msg); // 创建自定义样式的Dialog mLoadingDialog = new Dialog(context, R.style.loading_dialog); // 设置返回键无效 mLoadingDialog.setCancelable(false); mLoadingDialog.setContentView(layout, new LinearLayout.LayoutParams(   LinearLayout.LayoutParams.MATCH_PARENT,   LinearLayout.LayoutParams.MATCH_PARENT));}public void show(){ mLoadingDialog.show(); mLoadingView.startAnim();}public void close(){ if (mLoadingDialog!=null) {  mLoadingView.stopAnim();  mLoadingDialog.dismiss();  mLoadingDialog=null; }}}

<?xml version="1.0" encoding="utf-8"?><LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"android:id="@+id/dialog_view"android:layout_width="match_parent"android:layout_height="match_parent"android:gravity="center"android:background="@drawable/dialog_bg"android:padding="20dp"android:orientation="vertical"><com.ye.daqiapp.ui.widget.loading.LVCircularRing android:id="@+id/lv_circularring" android:layout_width="50dp" android:layout_height="50dp"/><TextView android:id="@+id/loading_text" android:layout_width="wrap_content" android:layout_height="wrap_content" android:textColor="#ffffff" android:layout_marginTop="5dp" android:textSize="15sp"/></LinearLayout>

<style name="loading_dialog" parent="android:style/Theme.Dialog"> <item name="android:windowFrame">@null</item> <item name="android:windowNoTitle">true</item> <item name="android:windowBackground">@android:color/transparent</item> <item name="android:windowIsFloating">true</item> <item name="android:backgroundDimEnabled">false</item> <item name="android:windowContentOverlay">@null</item></style>

<?xml version="1.0" encoding="utf-8"?><shape xmlns:android="http://schemas.android.com/apk/res/android"><!-- 内部颜色 --><solid android:color="#444444" /><!-- 圆角的幅度 --><corners android:bottomLeftRadius="3dp" android:bottomRightRadius="3dp" android:topLeftRadius="3dp" android:topRightRadius="3dp" /></shape>

LoadingDialog dialog=new LoadingDialog(context,"玩命加载中...");//显示Dialogdialog.show();//关闭Dialogdialog.close();