本文实例总结了Android实用编程技巧。分享给大家供大家参考，具体如下：

1.让一个图片透明：

Bitmap buffer = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_4444);buffer.eraseColor(Color.TRANSPARENT);

2.直接发送邮件：

Intent intent = new Intent(Intent.ACTION_SENDTO, Uri .fromParts("mailto", "test@test.com", null));intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);context.startActivity(intent);

3.程序控制屏幕变亮：

WindowManager.LayoutParams lp = getWindow().getAttributes();lp.screenBrightness = 100 / 100.0f;getWindow().setAttributes(lp);

4.过滤特定文本

Filter filter = myAdapter.getFilter();filter.filter(mySearchText);

5.scrollView scroll停止事件

setOnScrollListener(new OnScrollListener(){public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {// TODO Auto-generated method stub }public void onScrollStateChanged(AbsListView view, int scrollState) {// TODO Auto-generated method stubif(scrollState == 0) Log.i("a", "scrolling stopped..."); } });}

6. 对于特定的程序 发起一个关联供打开

Bitmap bmp = getImageBitmap(jpg);String path = getFilesDir().getAbsolutePath() + "/test.png";File file = new File(path);FileOutputStream fos = new FileOutputStream(file);bmp.compress( CompressFormat.PNG, 100, fos ); fos.close(); Intent intent = new Intent(); intent.setAction(android .content.Intent.ACTION_VIEW); intent.setDataAndType(Uri .fromFile(new File(path)), "image/png"); startActivity(intent);

对于图片上边的不适用索引格式会出错。

Intent intent = new Intent();intent.setAction(android .content.Intent.ACTION_VIEW);File file = new File("/sdcard/test.mp4");intent.setDataAndType(Uri .fromFile(file), "video/*");startActivity(intent);Intent intent = new Intent();intent.setAction(android .content.Intent.ACTION_VIEW);File file = new File("/sdcard/test.mp3");intent.setDataAndType(Uri .fromFile(file), "audio/*");startActivity(intent);

7.设置文本外观

setTextAppearance(context, android .R.style.TextAppearance_Medium);android :textAppearance="?android :attr/textAppearanceMedium"

8.设置单独的发起模式：

<activity android :name=".ArtistActivity" android :label="Artist" android :launchMode="singleTop"></activity>Intent i = new Intent();i.putExtra(EXTRA_KEY_ARTIST, id);i.setClass(this, ArtistActivity.class);i.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);startActivity(i);

9.创建一个圆角图片

这个的主要原理其实就是利用遮罩，先创建一个圆角方框 然后将图片放在下面：

Bitmap myCoolBitmap = ... ; int w = myCoolBitmap.getWidth(), h = myCoolBitmap.getHeight(); Bitmap rounder = Bitmap.createBitmap(w,h,Bitmap.Config.ARGB_8888); Canvas canvas = new Canvas(rounder); Paint xferPaint = new Paint(Paint.ANTI_ALIAS_FLAG); xferPaint.setColor(Color.RED); canvas.drawRoundRect(new RectF(0,0,w,h), 20.0f, 20.0f, xferPaint); xferPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_IN));//然后呢实现canvas.drawBitmap(myCoolBitmap, 0,0, null);canvas.drawBitmap(rounder, 0, 0, xferPaint);

10.在notification 上的icon上加上数字 给人提示有多少个未读

Notification notification = new Notification (icon, tickerText, when);notification .number = 4;

11.背景渐变：

首先建立文件drawable/shape.xml

<?xml version="1.0" encoding="utf-8"?><shape xmlns:android ="http://schemas.android .com/apk/res/android " android :shape="rectangle"> <gradient android :startColor="#FFFFFFFF" android :endColor="#FFFF0000" android :angle="270"/></shape>

在该文件中设置渐变的开始颜色(startColor)、结束颜色(endColor)和角度(angle)

接着创建一个主题values/style.xml

<?xml version="1.0" encoding="utf-8"?><resources><style name="NewTheme" parent="android :Theme"><item name="android :background">@drawable/shape</item></style></resources>

然后在AndroidManifest.xml文件中的application或activity中引入该主题,如:

<activity android :name=".ShapeDemo" android :theme="@style/NewTheme">

该方法同样适用于控件

<?php xml version="1.0" ?>?<response><error>1</error><message>Invalid URL.</message></response>

12. 储存数据 当你在一个实例中保存静态数据，此示例关闭后 下一个实例想引用 静态数据就会为null，这里呢必须重写applition

public class MyApplication extends Application{ private String thing = null; public String getThing(){ return thing; } public void setThing( String thing ){ this.thing = thing; }}public class MyActivity extends Activity { private MyApplication app; public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); app = ((MyApplication)getApplication()); String thing = app.getThing(); }}

更多关于Android相关内容感兴趣的读者可查看本站专题：《Android开发入门与进阶教程》、《Android视图View技巧总结》、《Android布局layout技巧总结》、《Android调试技巧与常见问题解决方法汇总》、《Android多媒体操作技巧汇总(音频,视频,录音等)》、《Android基本组件用法总结》及《Android控件用法总结》

希望本文所述对大家Android程序设计有所帮助。