如何归纳和利用Android中常用的实用代码片段？

Android实用的代码片段常用代码归纳

一、存储卡状态检查

查看是否有存储卡插入

String status = Environment.getExternalStorageState();
if (status.equals(Environment.MEDIA_MOUNTED)) {
    // 说明有SD卡插入
}

二、Activity透明主题设置

让某个Activity透明

在onCreate中不设Layout，并使用以下代码：

this.setTheme(R.style.Theme_Transparent);

定义Theme_Transparent（注意transparent_bg是一副透明的图片）：

<style name="Theme.Transparent">
    <item name="android:windowIsTranslucent">true</item>
    <item name="android:windowBackground">@drawable/transparent_bg</item>
    <item name="android:windowContentOverlay">@null</item>
    <item name="android:windowNoTitle">true</item>
    <item name="android:windowIsFloating">true</item>
    <item name="android:backgroundDimEnabled">false</item>
</style>

三、屏幕元素句柄获取

在屏幕元素中设置句柄

TextView msgTextView = (TextView) findViewById(R.id.msg);
msgTextView.setText(R.string.push_me);

四、发送短信与彩信

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);

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));
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);

五、发送邮件

发送邮件

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);

六、广播接收器注册

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();
}
}
}

七、数据表监听器定义

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) {｝
}

八、获取手机UA

获取手机UA

public String getUserAgent() {
String user_agent = ProductProperties.get(ProductProperties.USER_AGENT_KEY, null);
return user_agent;
}

九、清空手机上Cookie

清空手机上Cookie

CookieSyncManager.createInstance(getApplicationContext());
CookieManager.getInstance().removeAllCookie();

十、建立GPRS连接

建立GPRS连接

private boolean openDataConnection() {
DataConnection conn = DataConnection.getInstance();
if (connectMode == 0) {
ret = conn.openConnection(mContext, "cmwap", "cmwap", "cmwap");
} else {
ret = conn.openConnection(mContext, "c");
}
return ret;
}

到此，以上就是小编对于“Android实用的代码片段常用代码归纳”的问题就介绍到这了，希望介绍的几点解答对大家有用，有任何问题和不懂的，欢迎各位朋友在评论区讨论，给我留言。