项目中用到的android代码
1、全屏窗口
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);
Preference Activity
Layout\crc.xml
<?xml version="1.0" encoding="utf-8" ?>
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
<PreferenceCategory android:title="CRC Test">
<PreferenceScreen
android:title="1. BIN CRC"
android:summary="Code Area CRC"
android:key="bin_crc">
</PreferenceScreen>
<PreferenceScreen
android:title="2. EFS CRC Detail"
android:summary="EFS CRC Detail"
android:key="efs_crc">
<intent
android:action="android.intent.action.MAIN"
android:targetPackage="com.dhz.testapp"
android:targetClass="com.dhz.testapp.efscrc"/>
</PreferenceScreen>
</PreferenceCategory>
</PreferenceScreen>
2、Preference 添加单击处理
PreferenceScreen BINCRC = (PreferenceScreen)getPreferenceScreen().findPreference("bin_crc");
BINCRC.setOnPreferenceClickListener(new Preference.OnPreferenceClickListener() {
public boolean onPreferenceClick(Preference preference) {
BINCRC.setSummary("Detect a click");
return true;
}
});
3、运行一个命令或程序获取结果/正则表达式查找匹配/分隔字符串
Process process1 = new ProcessBuilder("cat", "/opl/etc/system.prop").start();
BufferedReader br1 = new BufferedReader(new InputStreamReader(process1.getInputStream()));
Pattern pattern = Pattern.compile("apps.setting.platformversion");
String line;
while ((line = br1.readLine()) != null) {
Matcher matcher = pattern.matcher(line);
if(matcher.find(){
String[] temp = line.split(" = ");
if(temp.length > 1)
mRver.setSummary(temp[1]);
else
mRver.setSummary("/opl/etc/system.prop not configed well.");
}
}
if(process1 != null)
process1.destroy();
if(br1 != null)
br1.close();
4、计算一个文件的CRC32值
import java.util.zip.CRC32;
FileInputStream inStream = null;
BufferedInputStream in = null;
CRC32 crc32 = new CRC32();
inStream = new FileInputStream(filePath);
in = new BufferedInputStream(inStream,size_8k);
for(int i;(i=in.read())!=-1;)
{
crc32.update(i);
}
Log.d(TAG, filePath +" CRC32: "+Long.toHexString(crc32.getValue()));
if(inStream != null)
inStream.close();
if(in != null)
in.close();
5、显示一个模态对话框，带yes/no按钮
new AlertDialog.Builder(efscrc.this)
.setMessage("Work Done! Show results?")
.setCancelable(false)
.setPositiveButton("Yes",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,int whichButton) {
showResult();
}
})
.setNegativeButton("No",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,int whichButton) {
dialog.dismiss();
}
})
.show();
6、判断是否有SDCard
if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED))
{
copyToSDCard(logFilePath);
}
else {
Toast.makeText(FPRITest.this,"No SDCard! Please insert SDCard. ",Toast.LENGTH_SHORT).show();
}
7、结果集排序/List遍历
List<String> resultList = new ArrayList<String>();
resultList.add(str1);
......
resultList.add(strn);
Collections.sort(resultList);
FileOutputStream outStream = new FileOutputStream(efsCRCResultFile);
Iterator itr = resultList.iterator();
while (itr.hasNext()) {
outStream.write(((String)itr.next()).getBytes());
}
8、非递归方法枚举目录下所有文件（含子目录）
private void getFileList(String dirPath)
{
LinkedList<File> mDirList = new LinkedList<File>();
File dir = n
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ew File(dirPath);
mDirList.add(dir);
File files[] = null;
int count = 0;
String filePath = null;
File tmp = null;
while (!mDirList.isEmpty()) {
tmp = mDirList.removeFirst();
//handle files in one directory.
files = tmp.listFiles();
if (files == null)
continue;
for (int i = 0; i < files.length; i++)
{
if (files[i].isDirectory())
mDirList.add(files[i]);
else
{
Log.d(TAG,files[i].getAbsolutePath() + " " + count);
count ++;
}
}
}
Log.d(TAG,"getFileList finish,file count: " + count);
}
9、添加秘密程序，通过拨号启动
AndroidManifest.xml
<receiver android:name=".secret">
<intent-filter>
<action android:name="android.provider.Telephony.SECRET_CODE" />
<data android:scheme="android_secret_code" android:host="1234"/>
</intent-filter>
</receiver>
secret.java
public class secret extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
String host = intent.getData() != null ? intent.getData().getHost() : null;
if (Intents.SECRET_CODE_ACTION.equals(action) && "1234".equals(host)) {
//start an acitivity
}
}
}
SECRET_CODE_ACTION
public static final String SECRET_CODE_ACTION Broadcast Action: A "secret code" has been entered in the dialer. Secret codes are of the form *#*##*#*. The intent will have the data URI:
android_secret_code://<code>
10、格式化SD卡/卸载SD卡
private IMountService mMountService;
mMountService = getMountService();
private synchronized IMountService getMountService() {
if (mMountService == null) {
IBinder service = ServiceManager.getService("mount");
if (service != null) {
mMountService = IMountService.Stub.asInterface(service);
} else {
Log.e(TAG, "Can't get mount service");
}
}
return mMountService;
}
//format sdcard
mMountService.formatMedia(Environment.getExternalStorageDirectory().toString());
//unmount sdcard
mMountService.unmountMedia(Environment.getExternalStorageDirectory().toString());
11、保持屏幕常亮
PowerManager.WakeLock wakeLock;
12、启用屏幕常亮功能
wakeLock = ((PowerManager)getSystemService(POWER_SERVICE)).
newWakeLock(PowerManager.SCREEN_BRIGHT_WAKE_LOCK | PowerManager.ON_AFTER_RELEASE, "MyActivity");
wakeLock.acquire();
//PowerManager.SCREEN_DIM_WAKE_LOCK 这个可维持在低明状态，还有其他的标志，可参考Andoid文档
13、关闭屏幕常亮功能
if (wakeLock != null) {
wakeLock.release();
}
15、需要权限
<uses-permission android:name="android.permission.WAKE_LOCK" />
为了不对其他程序造成影响，启用和关闭屏幕常亮的代码一般被放在 Activity 的 onResume() 和 onPause() 事件中。
调用setting的校准屏幕功能
Intent intent = new Intent();
intent.setAction("android.intent.action.MAIN");
intent.setComponent(new ComponentName("com.android.settings","com.android.settings.Calibration"));
startActivity(intent);
16、DOM解析XML文档
DOM为XML 文档的解析定义了一组接口。解析器读入整个文档，然后构建一个驻留内存的树结构，然后代码就可以使用 DOM 接口来操作这个树结构。
优点：整个文档树在内存中，便于操作；支持删除、修改、重新排列等多种功能；
缺点：将整个文档调入内存（包括无用的节点），浪费时间和空间；
使用场合：一旦解析了文档还需多次访问这些数据；硬件资源充足（内存、CPU）。
public void parserXml(String fileName) {
try {
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder();
Document document = db.parse(fileName);
NodeList employees = document.getChildNodes();
for (int i = 0; i < employees.getLength(); i++) { };
NodeList paramList = document.getElementsByTagName("yourTag");
for(int i=0; i<paramList.getLength(); i++){
Node paramNode = paramList.item(i);
NamedNodeMap attrs = paramNode
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.getAttributes();
for(int j=0; j<attrs.getLength();j++){
String itemName = attrs.item(j).getNodeName();
String itemVal = attrs.item(j).getNodeValue();
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
//////////////////////////
\androin 有用的代码片段
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
1：查看是否有存储卡插入
String status=Environment.getExternalStorageState();
if(status.equals(Enviroment.MEDIA_MOUNTED))
{
说明有SD卡插入
}
2：让某个Activity透明
OnCreate中不设Layout
this.setTheme(R.style.Theme_Transparent);
以下是Theme_Transparent的定义（注意 transparent_bg是一副透明的图片）
3：在屏幕元素中设置句柄
使用Activity.findViewById来取得屏幕上的元素的句柄. 使用该句柄您可以设置或获取任何该对象外露的值.
TextView msgTextView = (TextView)findViewById(R.id.msg);
msgTextView.setText(R.string.push_me);
4：发送短信
String body=”this is mms demo”;
Intent mmsintent = new Intent(Intent.ACTION_SENDTO, Uri.fromParts(”smsto”, number, null));
mmsintent.putExtra(Messaging.KEY_ACTION_SENDTO_MESSAGE_BODY, body);
mmsintent.putExtra(Messaging.KEY_ACTION_SENDTO_COMPOSE_MODE, true);
mmsintent.putExtra(Messaging.KEY_ACTION_SENDTO_EXIT_ON_SENT, true);
startActivity(mmsintent);
5：发送彩信
StringBuilder sb = new StringBuilder();
sb.append(”file://”);
sb.append(fd.getAbsoluteFile());
Intent intent = new Intent(Intent.ACTION_SENDTO, Uri.fromParts(”mmsto”, number, null));
// Below extra datas are all optional.
intent.putExtra(Messaging.KEY_ACTION_SENDTO_MESSAGE_SUBJECT, subject);
intent.putExtra(Messaging.KEY_ACTION_SENDTO_MESSAGE_BODY, body);
intent.putExtra(Messaging.KEY_ACTION_SENDTO_CONTENT_URI, sb.toString());
intent.putExtra(Messaging.KEY_ACTION_SENDTO_COMPOSE_MODE, composeMode);
intent.putExtra(Messaging.KEY_ACTION_SENDTO_EXIT_ON_SENT, exitOnSent);
startActivity(intent);
6：发送Mail
mime = “img/jpg”;
shareIntent.setDataAndType(Uri.fromFile(fd), mime);
shareIntent.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(fd));
shareIntent.putExtra(Intent.EXTRA_SUBJECT, subject);
shareIntent.putExtra(Intent.EXTRA_TEXT, body);
7：注册一个BroadcastReceiver
registerReceiver(mMasterResetReciever, new IntentFilter(”oms.action.MASTERRESET”));
private BroadcastReceiver mMasterResetReciever = new BroadcastReceiver() {
public void onReceive(Context context, Intent intent){
String action = intent.getAction();
if(”oms.action.MASTERRESET”.equals(action)){
RecoverDefaultConfig();
}
}
};
8： 定义ContentObserver，监听某个数据表
private ContentObserver mDownloadsObserver = new DownloadsChangeObserver(Downloads.CONTENT_URI);
private class DownloadsChangeObserver extends ContentObserver {
public DownloadsChangeObserver(Uri uri) {
super(new Handler());
}
@Override
public void onChange(boolean selfChange) {｝
}
9：获得 手机UA
public String getUserAgent()
{
String user_agent = ProductProperties.get(ProductProperties.USER_AGENT_KEY, null);
return user_agent;
}
10：清空手机上Cookie
CookieSyncManager.createInstance(getApplicationContext());
CookieManager.getInstance().removeAllCookie();
11：建立GPRS连接
//Dial the GPRS link.
private boolean openDataConnection() {
// Set up data connection.
DataConnection conn = DataConnection.getInstance();
if (connectMode == 0) {
ret = conn.openConnection(mContext, “cmwap”, “cmwap”, “cmwap”);
} else {
ret = conn.openConnection(mContext, “cmnet”, “”, “”);
}
}
12：PreferenceActivity 用法
public class Setting extends PreferenceA
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ctivity
｛
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
addPreferencesFromResource(R.xml.settings)；
}
｝
Setting.xml:
android:key=”seting2″
android:title=”@string/seting2″
android:summary=”@string/seting2″/>
android:key=”seting1″
android:title=”@string/seting1″
android:summaryOff=”@string/seting1summaryOff”
android:summaryOn=”@stringseting1summaryOff”/>
13：通过HttpClient从指定server获取数据
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpGet method = new HttpGet(“http://www.baidu.com/1.html”);
HttpResponse resp;
Reader reader = null;
try {
// AllClientPNames.TIMEOUT
HttpParams params = new BasicHttpParams();
params.setIntParameter(AllClientPNames.CONNECTION_TIMEOUT, 10000);
httpClient.setParams(params);
resp = httpClient.execute(method);
int status = resp.getStatusLine().getStatusCode();
if (status != HttpStatus.SC_OK) return false;
// HttpStatus.SC_OK;
return true;
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
if (reader != null) try {
reader.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
14：显示toast
Toast.makeText(this._getApplicationContext(), R.string._item, Toast.LENGTH_SHORT).show();
///////////////////////////
\android 常用代码示例
///////////////////////////
1、
Intent用法2010-04-27 12:09Intent it = new Intent(Activity.Main.this, Activity2.class);
startActivity(it);
2.
向下一个Activity传递数据（使用Bundle和Intent.putExtras） Intent it = new Intent(Activity.Main.this, Activity2.class);
Bundle bundle=new Bundle();
bundle.putString("name", "This is from MainActivity!");
it.putExtras(bundle); // it.putExtra(“test”, "shuju”);
startActivity(it); // startActivityForResult(it,REQUEST_CODE);
对于数据 的获取可以采用： Bundle bundle=getIntent().getExtras();
String name=bundle.getString("name");
3.
向上一个Activity返回结果（使用setResult，针对startActivityForResult(it,REQUEST_CODE)启动 的Activity） Intent intent=getIntent();
Bundle bundle2=new Bundle();
bundle2.putString("name", "This is from ShowMsg!");
intent.putExtras(bundle2);
setResult(RESULT_OK, intent);
4.
回调上一个Activity的结果处理函数（onActivityResult） @Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// TODO Auto-generated method stub
super.onActivityResult(requestCode, resultCode, data);
if (requestCode==REQUEST_CODE){
if(resultCode==RESULT_CANCELED)
setTitle("cancle");
else if (resultCode==RESULT_OK) {
String temp=null;
Bundle bundle=data.getExtras();
if(bundle!=null) temp=bundle.getString("name");
setTitle(temp);
}
}
}
5、
显示网页
Uri uri = Uri.parse("http://google.com");
Intent it = new Intent(Intent.ACTION_VIEW, uri);
startActivity(it);
6、
显示地图
Uri uri = Uri.parse("geo:38.899533,-77.036476");
Intent it = new Intent(Intent.ACTION_VIEW, uri);
startActivity(it);
其他 geo URI 範例
geo:latitude,longitude
geo:latitude,longitude?z=zoom
geo:0,0?q=my+street+address
geo:0,0?q=business+near+city
google.streetview:cbll=lat,lng&cbp=1,yaw,,pitch,zoom&mz=mapZoom
7、
路径规划
Uri uri = Uri.parse("http://maps.google.com/maps?f=d&saddr=startLat%20startLng&daddr=endLat%20endLng&hl=en");
Intent it = new Intent(Intent.ACTION_VIEW, uri);
startActivity(it);
//where startLat, startLng, endLat, endLng are a lo
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ng with 6 decimals like: 50.123456
打 电话
1. //叫出拨号程序
2. Uri uri = Uri.parse("tel:0800000123");
3. Intent it = new Intent(Intent.ACTION_DIAL, uri);
4. startActivity(it);
1. //直接打电话出去
2. Uri uri = Uri.parse("tel:0800000123");
3. Intent it = new Intent(Intent.ACTION_CALL, uri);
4. startActivity(it);
5. //用這個，要在 AndroidManifest.xml 中，加上
6. //<uses-permission id="android.permission.CALL_PHONE" />
传 送SMS/MMS
1. //调用短信程序
2. Intent it = new Intent(Intent.ACTION_VIEW, uri);
3. it.putExtra("sms_body", "The SMS text");
4. it.setType("vnd.android-dir/mms-sms");
5. startActivity(it);
1. //传送消息
2. Uri uri = Uri.parse("smsto://0800000123");
3. Intent it = new Intent(Intent.ACTION_SENDTO, uri);
4. it.putExtra("sms_body", "The SMS text");
5. startActivity(it);
1. //传送 MMS
2. Uri uri = Uri.parse("content://media/external/images/media/23");
3. Intent it = new Intent(Intent.ACTION_SEND);
4. it.putExtra("sms_body", "some text");
5. it.putExtra(Intent.EXTRA_STREAM, uri);
6. it.setType("image/png");
7. startActivity(it);
传 送 Email
1. Uri uri = Uri.parse("mailto:xxx@abc.com");
2. Intent it = new Intent(Intent.ACTION_SENDTO, uri);
3. startActivity(it);
1. Intent it = new Intent(Intent.ACTION_SEND);
2. it.putExtra(Intent.EXTRA_EMAIL, "me@abc.com");
3. it.putExtra(Intent.EXTRA_TEXT, "The email body text");
4. it.setType("text/plain");
5. startActivity(Intent.createChooser(it, "Choose Email Client"));
1. Intent it=new Intent(Intent.ACTION_SEND);
2. String[] tos={"me@abc.com"};
3. String[] ccs={"you@abc.com"};
4. it.putExtra(Intent.EXTRA_EMAIL, tos);
5. it.putExtra(Intent.EXTRA_CC, ccs);
6. it.putExtra(Intent.EXTRA_TEXT, "The email body text");
7. it.putExtra(Intent.EXTRA_SUBJECT, "The email subject text");
8. it.setType("message/rfc822");
9. startActivity(Intent.createChooser(it, "Choose Email Client"));
1. //传送附件
2. Intent it = new Intent(Intent.ACTION_SEND);
3. it.putExtra(Intent.EXTRA_SUBJECT, "The email subject text");
4. it.putExtra(Intent.EXTRA_STREAM, "file:///sdcard/mysong.mp3");
5. sendIntent.setType("audio/mp3");
6. startActivity(Intent.createChooser(it, "Choose Email Client"));
播 放多媒体
Uri uri = Uri.parse("file:///sdcard/song.mp3");
Intent it = new Intent(Intent.ACTION_VIEW, uri);
it.setType("audio/mp3");
startActivity(it);
Uri uri = Uri.withAppendedPath(MediaStore.Audio.Media.INTERNAL_CONTENT_URI, "1");
Intent it = new Intent(Intent.ACTION_VIEW, uri);
startActivity(it);
Market 相关
1. //寻找某个应用
2. Uri uri = Uri.parse("market://search?q=pname:pkg_name");
3. Intent it = new Intent(Intent.ACTION_VIEW, uri);
4. startActivity(it);
5. //where pkg_name is the full package path for an application
1. //显示某个应用的相关信息
2. Uri uri = Uri.parse("market://details?id=app_id");
3. Intent it = new Intent(Intent.ACTION_VIEW, uri);
4. startActivity(it);
5. //where app_id is the application ID, find the ID
6. //by clicking on your application on Market home
7. //page, and notice the ID from the address bar
Uninstall 应用程序
1. Uri uri = Uri.fromParts("package", strPackageName, null);
2. Intent it = new Intent(Intent.ACTION_DELETE, uri);
3. startActivity(it);
/////////////////////////////////////////////////////////
\
///////////////////////////////////////////////////////
1、用代码安装APK程序
Intent i = new Intent(Intent.ACTION_VIEW);
String filePath = "/sdcard/XXX.apk";
i.setDataAndType(Uri.parse("file://" + filePath),"application/vnd.android.package-archive");
context.startActivity(i);
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