android开发小汇4

在android下启动Service

Start_Service.java 外部引用原始文档

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//Starts a service (task to be accomplished in the background, without UI) //The class employing the snippet code must implement ServiceConnection Intent iServ = new Intent(); iServ.setClass(getBaseContext(), ServiceName.class); //TODO Replace 'ServiceName' with the class name for your Service bindService(iServ, this, BIND_AUTO_CREATE); startService(iServ);

百度地图点mapView获取经纬度

Readme.txt 外部引用原始文档

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在onCreate（）里调mMapView.getOverlays().add(new GetOverlay()); 源码：[http://www.eoeandroid.com/thread-160682-1-2.html](http://www.eoeandroid.com/thread-160682-1-2.html)

GetOverlay.java 外部引用原始文档

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class GetOverlay extends Overlay{ GeoPoint geo; @Override public void draw(Canvas canvas, MapView mapView, boolean arg2) { super.draw(canvas, mapView, arg2); if(geo==null){ return; } Log.d(toString(), arg2+"-------draw--"); Projection projection = mapView.getProjection(); // 把经纬度变换到相对于MapView左上角的屏幕像素坐标 Point point = projection.toPixels(geo, null); // 可在此处添加您的绘制代码 Paint paintText = new Paint(); paintText.setColor(Color.RED); paintText.setTextSize(35); canvas.drawText("●", point.x-9, point.y+13, paintText); // 绘制文本 } @Override public boolean onTap(GeoPoint geo, MapView arg1) { Log.d(this.toString(), geo.getLongitudeE6()/1E6+"----------"+geo.getLatitudeE6()/1E6); return super.onTap(geo, arg1); } } 地图, View, Canvas, 屏幕, 像素

Android 自定义Toast提示消息的图标

Toast.java 外部引用原始文档

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/* 用Toast方式显示 */ Toast toast = Toast.makeText(EX05_07.this, mTextView.getText(), Toast.LENGTH_LONG); View textView = toast.getView(); lay.setOrientation(LinearLayout.HORIZONTAL); /* 在Toast里加上图片 */ mView01.setImageResource(R.drawable.icon); /* 在Toast里显示图片 */lay.addView(mView01); /* 在Toast里显示文字 */lay.addView(textView); toast.setView(lay); toast.show();

android圆角

readme 外部引用原始文档

1	实现android圆角

11.jpg 外部引用原始文档

style.xml 外部引用原始文档

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<?xml version="1.0" encoding="utf-8"?> <shape xmlns:android="http://schemas.android.com/apk/res/android" > <solid android:color="#ffffff" /> <corners android:bottomLeftRadius="20dp" android:bottomRightRadius="20dp" android:topLeftRadius="20dp" android:topRightRadius="20dp" /> </shape>

实现IOS圆角风格的列表ListView

.java 外部引用原始文档

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这段代码目前已经加在我的一个jar包androidkit中，还没发布。 适用于android1.6以上，不依赖其他jar包 使用时不需要继承这里的RoundListAdapter。只需要在你实现了ListAdapter的类中，传入一个RoundParams的对象，并在getView方法返回前调用这里RoundListAdapter类提供的静态方法。 RoundListAdapter.setItemBackground(position, switcherView, mParams, getCount()); /* * @(#)RoundListAdapter.java Project:com.sinaapp.msdxblog.androidkit * Date:2012-12-6 * * Copyright (c) 2011 CFuture09, Institute of Software, * Guangdong Ocean University, Zhanjiang, GuangDong, China. * All rights reserved. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.lurencun.cfuture09.androidkit.widget.roundlist; import android.view.View; import android.widget.ListAdapter; /** * @author Geek_Soledad ([email protected]) */ public abstract class RoundListAdapter implements ListAdapter { /** * 圆角ListView的参数类。定义了顶部背景，底部背景，中间背景及单独一个时的背景。 * * @author msdx * */ public static class RoundParams { public int topResid; public int middleResid; public int bottomResid; public int lonelyResid; public RoundParams(int topResid, int middleReside, int bottomResid, int lonelyResid) { this.topResid = topResid; this.middleResid = middleReside; this.bottomResid = bottomResid; this.lonelyResid = lonelyResid; } } public static void setItemBackground(int position, View item, final RoundParams mParams, final int count) { if (count == 1) { item.setBackgroundResource(mParams.lonelyResid); } else if (position > 0 && position < count - 1) { item.setBackgroundResource(mParams.middleResid); } else if (position == 0) { item.setBackgroundResource(mParams.topResid); } else { item.setBackgroundResource(mParams.bottomResid); } } }

Looper和handler使用

LooperThread.java 外部引用原始文档

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class LooperThread extends Thread { public Handler mHandler; public void run() { Looper.prepare(); mHandler = new Handler() { public void handleMessage(Message msg) { // process incoming messages here } }; Looper.loop(); } }

Android图片拖动

MainActivity.java 外部引用原始文档

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package com.cndemo; import android.app.Activity; import android.os.Bundle; import android.view.Menu; import android.view.MotionEvent; import android.view.View; import android.widget.ImageView; public class MainActivity extends Activity { private float mx; private float my; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); super.onCreate(savedInstanceState); final ImageView switcherView = (ImageView) this.findViewById(R.id.img); switcherView.setOnTouchListener(new View.OnTouchListener() { public boolean onTouch(View arg0, MotionEvent event) { float curX, curY; switch (event.getAction()) { case MotionEvent.ACTION_DOWN: mx = event.getX(); my = event.getY(); break; case MotionEvent.ACTION_MOVE: curX = event.getX(); curY = event.getY(); switcherView.scrollBy((int) (mx - curX), (int) (my - curY)); mx = curX; my = curY; break; case MotionEvent.ACTION_UP: curX = event.getX(); curY = event.getY(); switcherView.scrollBy((int) (mx - curX), (int) (my - curY)); break; } return true; } }); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.activity_main, menu); return true; } }

main.xml 外部引用原始文档

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<RelativeLayout 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" > <ImageView android:id="@+id/img" android:layout_width="wrap_content" android:layout_height="wrap_content" android:scaleType="center" android:src="@drawable/img8" /> </RelativeLayout>