Android实现自定义加载框的代码示例

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); }   @Override public 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(); }   @Override public void dismiss() { mAnim.cancel(); super.dismiss(); }   @Override public void setTitle(CharSequence title) { if (TextUtils.isEmpty(title)) { detail_tv.setText("正在加载"); } else { detail_tv.setText(title); } }   @Override public 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(); 

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。

忘掉失败，不过要牢记失败中的教训。