Android 自定义加载框

App在与服务器进行网络交互的时候，需要有一个提示的加载框，如图：

，此时我们可以自定义一个加载中的对话框，代码如下：

public class LoadingDialog extends Dialog {private static final int CHANGE_TITLE_WHAT = 1;private static final int CHNAGE_TITLE_DELAYMILLIS = 300;private static final int MAX_SUFFIX_NUMBER = 3;private static final char SUFFIX = '.';private ImageView iv_route;private TextView detail_tv;private TextView tv_point;private RotateAnimation mAnim;private Handler handler = new Handler() {private int num = 0;public void handleMessage(android.os.Message msg) {if (msg.what == CHANGE_TITLE_WHAT) {StringBuilder builder = new StringBuilder();if (num >= MAX_SUFFIX_NUMBER) {num = 0;}num++;for (int i = 0; i < num; i++) {builder.append(SUFFIX);}tv_point.setText(builder.toString());if (isShowing()) {handler.sendEmptyMessageDelayed(CHANGE_TITLE_WHAT, CHNAGE_TITLE_DELAYMILLIS);}else {num = 0;}}};};public LoadingDialog(Context context) {super(context, R.style.Dialog_bocop);init();}public LoadingDialog(Context context, boolean isTrans) {super(context, isTrans ? R.style.Loading_Dialog_trans : R.style.Dialog_bocop);init();}private void init() {setContentView(R.layout.common_dialog_loading_layout);iv_route = (ImageView) findViewById(R.id.iv_route);detail_tv = (TextView) findViewById(R.id.detail_tv);tv_point = (TextView) findViewById(R.id.tv_point);initAnim();getWindow().setWindowAnimations(R.anim.alpha_in);}private void initAnim() {// mAnim = new RotateAnimation(360, 0, Animation.RESTART, 0.5f, Animation.RESTART, 0.5f);mAnim = new RotateAnimation(0, 360, Animation.RESTART, 0.5f, Animation.RESTART, 0.5f);mAnim.setDuration(2000);mAnim.setRepeatCount(Animation.INFINITE);mAnim.setRepeatMode(Animation.RESTART);mAnim.setStartTime(Animation.START_ON_FIRST_FRAME);}@Overridepublic void show() {//在要用到的地方调用这个方法iv_route.startAnimation(mAnim);handler.sendEmptyMessage(CHANGE_TITLE_WHAT);super.show();}@Overridepublic void dismiss() {mAnim.cancel();super.dismiss();}@Overridepublic void setTitle(CharSequence title) {if (TextUtils.isEmpty(title)) {detail_tv.setText("正在加载");}else {detail_tv.setText(title);}}@Overridepublic void setTitle(int titleId) {setTitle(getContext().getString(titleId));}public static void dismissDialog(LoadingDialog loadingDialog) {if (null == loadingDialog) { return; }loadingDialog.dismiss();}}-------------对应的布局如下------------------<?xml version="1.0" encoding="utf-8"?>    <LinearLayout   xmlns:android="http://schemas.android.com/apk/res/android"        android:layout_width="160dp"        android:layout_height="160dp"        android:layout_gravity="center"        android:background="@drawable/common_show_dialog"        android:orientation="vertical" >        <RelativeLayout            android:layout_width="fill_parent"            android:layout_height="0dp"            android:layout_weight="3"            android:paddingTop="22dp"            android:gravity="center" >            <ImageView                android:id="@+id/iv_route"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:layout_centerHorizontal="true"                android:layout_centerVertical="true"                android:background="@drawable/dialog_bocop_loading_rotate_anim_img" />        </RelativeLayout>        <RelativeLayout            android:layout_width="fill_parent"            android:layout_height="0dp"            android:layout_marginBottom="15dp"            android:layout_marginLeft="10dp"            android:layout_marginRight="10dp"            android:layout_weight="1"            android:gravity="center_horizontal" >            <TextView                android:id="@+id/detail_tv"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:layout_toLeftOf="@+id/tv_point"                android:ellipsize="marquee"                android:gravity="center"                android:singleLine="true"                android:text="正在加载..."                android:textColor="#ffffff"                android:textSize="20sp" />            <TextView                android:id="@+id/tv_point"                android:layout_width="20dp"                android:layout_height="wrap_content"                android:layout_alignParentRight="true"                android:text="..."                android:textColor="#ffffff"                android:textSize="20sp" />        </RelativeLayout>    </LinearLayout>比如在Activity中要实现加载对话框调用 ：LoadingDialog loadingDialog ;if (null == loadingDialog) {loadingDialog = new LoadingDialog(aty);loadingDialog.setOnCancelListener(this);}loadingDialog.setTitle(“数据加载中”);if (!loadingDialog.isShowing()) loadingDialog.show();