Android 筆記

2012年12月7日星期五

String to char array

if(content.toCharArray()[0]=='t'){

content is a string.
.toCharArray() is the function.
[0] Something you know already.

在BroadcastReceiver內使用Internal Storage I/O

//Read in. st. from File"screenoff"
String fileName = "screenoff";
int readed;
String content="";
byte[] buff = new byte[256]; //input stream buffer
//Input stream
try{
FileInputStream reader = context.getApplicationContext().openFileInput(fileName);
while((readed = reader.read(buff))!=-1){
content+=new String(buff).trim();
}
}catch(FileNotFoundException e){
e.printStackTrace();
}catch (IOException e){
e.printStackTrace();
}
//End of Read in. st. from File"screenoff"

----------------------------------------------------------------------------------------------------
Instead of openFileInput("string.txt"); try usingcontext.getApplicationContext().openFileInput("string.txt");.

Success BroadcastReceiver

MyBroadCastReciever.java

public class MyBroadCastReciever extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        if (intent.getAction().equals(Intent.ACTION_SCREEN_OFF)) {
            Log.i("Check","Screen went OFF");
            Toast.makeText(context, "screen OFF",Toast.LENGTH_LONG).show();
        } else if (intent.getAction().equals(Intent.ACTION_SCREEN_ON)) {
            Log.i("Check","Screen went ON");
            Toast.makeText(context, "screen ON",Toast.LENGTH_LONG).show();
        }
    }
}

MainActivity.java

IntentFilter filter = new IntentFilter(Intent.ACTION_SCREEN_OFF);
        MyBroadCastReciever r = new MyBroadCastReciever();
        registerReceiver(r,filter);
        
        IntentFilter filter2 = new IntentFilter(Intent.ACTION_SCREEN_ON);
        MyBroadCastReciever r2 = new MyBroadCastReciever();
        registerReceiver(r2,filter2);

2012年12月6日星期四

廣播機制 Broadcast 和BroadReceiver

2011-03-23 16:11:45| 分类： Android | 标签：android intent context import private |字号订阅
1、作用

异步操作、通知
2、两种注册方式
2.1 在AndroidManifest.xml中注册
<receiver android:name="EoeAndroidReceiver">
<intent-filter>
<action android:name="com.eoeandroid.action.NEW_BROADCAST" />
</intent-filter>
</receiver>
2.2 在代码中直接注册
IntentFilter filter = new IntentFilter(NEW_BROADCAST);
EoeAndroidReceiver eoeandroidReceiver = new EoeAndroidReceiver();
registerReceiver(eoeandroidReceiver,filter);

3、注销
unregisterReceiver(eoeandroidReceiver);

4、发送广播

sendBroadcast(intent);

5、接收广播
onReceiver(Context context,Intent intent);

6、示例

6.1 MainActivity.Java

package com.browan.server;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;

public class MainActivity extends Activity {
private static final int ITEM0 = Menu.FIRST;
private static final int ITEM1 = Menu.FIRST + 1;

private static final String ACTION_1 = "com.eoeandroid.action.NEW_BROADCAST1";
private static final String ACTION_2 = "com.eoeandroid.action.NEW_BROADCAST2";
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);//相关布局模板文件main.xml
setTitle("按menu菜单触发测试");
}

public boolean onCreateOptionsMenu(Menu menu)
{
super.onCreateOptionsMenu(menu);
menu.add(0,ITEM0,0,"显示Notification");
menu.add(0,ITEM1,0,"消除Notification");
menu.findItem(ITEM1);
return true;
}

public boolean onOptionsItemSelected(MenuItem item)
{
switch(item.getItemId())
{
case ITEM0:
actionClickMenuItem1();
break;
case ITEM1:
actionClickMenuItem2();
break;
}
return true;
}

private void actionClickMenuItem1() {
// TODO Auto-generated method stub
Intent intent = new Intent(ACTION_1);
sendBroadcast(intent);
}

private void actionClickMenuItem2() {
// TODO Auto-generated method stub
Intent intent = new Intent(ACTION_2);
sendBroadcast(intent);
}

}

6.2 EoeAndroidReceiver1.Java

package com.browan.server;

import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;

public class EoeAndroidReceiver1 extends BroadcastReceiver{
private static final int NOTIPICATION_ID = 21321;
Context context;

@Override
public void onReceive(Context context, Intent intent) {
// TODO Auto-generated method stub
this.context = context;
showNotification();
}

@SuppressWarnings("unused")
private void showNotification() {
// TODO Auto-generated method stub
// 实例化通知管理器
NotificationManager notificationManager = (NotificationManager) context.getSystemService(android.content.Context.NOTIFICATION_SERVICE);
// 实例化一个通知，并指定其图标和标题（在提示栏上显示）
Notification notification = new Notification(R.drawable.icon,"在EoeAndroidReceiver1里",System.currentTimeMillis());

// 指定单击通知后所打开的详细的通知页面（单击通知后打开 NotificationView）
PendingIntent contentIntent = PendingIntent.getActivity(context, 0, new Intent(context,MainActivity.class), 0);
// 设置通知的发送人和通知的详细内容（打开提示栏后在通知列表中显示）
notification.setLatestEventInfo(context, "通知发送人", "我是详细的通知信息我是详细的通知信息我是详细的通知信息", contentIntent);
// 发出通知（其中第一个参数为通知标识符）
notificationManager.notify(getNotipicationId(), notification);
}

public static int getNotipicationId() {
return NOTIPICATION_ID;
}
}

6.3 EoeAndroidReceiver2.Java

package com.browan.server;

import android.app.NotificationManager;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;

public class EoeAndroidReceiver2 extends BroadcastReceiver{
Context context;

@Override
public void onReceive(Context context, Intent intent) {
// TODO Auto-generated method stub
this.context = context;
deleteNotification();
}

private void deleteNotification() {
// TODO Auto-generated method stub
NotificationManager notificationManager = (NotificationManager) context.getSystemService(android.content.Context.NOTIFICATION_SERVICE);
notificationManager.cancel(EoeAndroidReceiver1.getNotipicationId());
}
}
6.4 AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.browan.server"
android:versionCode="1"
android:versionName="1.0">

<uses-permission android:name="android.permission.NEW_BROADCAST1" />
<uses-permission android:name="android.permission.NEW_BROADCAST2" />
<application android:icon="@drawable/icon" android:label="@string/app_name">
<activity android:name=".MainActivity"
android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>


<receiver android:name="EoeAndroidReceiver1">
<intent-filter>
<action android:name="com.eoeandroid.action.NEW_BROADCAST1" />
</intent-filter>
</receiver>

<receiver android:name="EoeAndroidReceiver2">
<intent-filter>
<action android:name="com.eoeandroid.action.NEW_BROADCAST2" />
</intent-filter>
</receiver>
</application>
</manifest>

2012年12月5日星期三

android短信监听（ZZ）

(2010-08-06 15:10:13)
转载
标签：
it
分类：知识收藏
接收短信也是比较方便的，主要是继承BroadcaseReceiver 类 ,覆盖onReceive 函数：

1:相关类：
android.content.BroadcastReceiver
android.telephony.gsm.SmsMessage;

2:example code.

public class MessageDemo extends BroadcastReceiver {
private static final String strACT = "android.provider.Telephony.SMS_RECEIVED";

public void onReceive(Context context, Intent intent) {
if (intent.getAction().equals(strACT)) {
StringBuilder sb = new StringBuilder();
Bundle bundle = intent.getExtras();
if (bundle != null) {
Object[] pdus = (Object[]) bundle.get("pdus");
SmsMessage[] msg = new SmsMessage[pdus.length];
for (int i = 0; i < pdus.length; i++) {
msg[i] = SmsMessage.createFromPdu((byte[]) pdus[i]);
}
for (SmsMessage currMsg : msg) {
sb.append("From:");
sb.append(currMsg.getDisplayOriginatingAddress());
sb.append("\nMessage:");
sb.append(currMsg.getDisplayMessageBody());
}
}
}

}
}
3: 相关的配置

修改AndroidManifest.xml，在Activity下添加receiver节点：
<receiver android:name="MessageDemo">
<intent-filter>
<action android:name="android.provider.Telephony.SMS_RECEIVED" />
</intent-filter>
</receiver>
随后在application下添加节点：
<uses-permission android:name="android.permission.SEND_SMS"></uses-permission>
<uses-permission android:name="android.permission.RECEIVE_SMS"></uses-permission>

4:使用BroadReceiver的弊端
查看BroadReceiver sdk reference , 可以了解到所有的BroadReceiver对短信的接收是无顺序的状态，即使是使用了Ordered broadcasts对于同等优先级别的BroadReceiver ,也会产生无顺序的行为。
所以下面介绍另一种接收短信的行为，包括其中可以进行短信的删除。

5：从数据库端监听sms的收发
//如下主要用于内部数据库改变，向外面的界面(Activity)做反应
class SMSHandler extends Handler
{
public void handleMessage(Message msg)
{
//Handle message
}
}

// 对收到短消息后，做出的处理,这里直接删除，并没有反应到界面，所以上面的handleMessage是空的。
class SMSObserver extends ContentObserver
{
private Handle m_handle = null;

public SMSObserver(Handle handle)
{
super(handle);
m_handle = handle;
}

public void onChange(boolean bSelfChange)
{
super.onChange(bSelfChange);

//Send message to Activity
Message msg = new Message();
msg.obj = "xxxxxxxxxx";
m_handle.sendMessage(msg);

String strUriInbox = "content://sms/inbox";
Uri uriSms = Uri.parse(strUriInbox); //If you want to access all SMS, just replace the uri string to "content://sms/"
Cursor c = mContext.getContentResolver().query(uriSms, null, null, null, null);
// delete all sms here when every new sms occures.
while (c.moveToNext())
{
//Read the contents of the SMS;
for(int i; i < c.getColumnCount(); i++)
{
String strColumnName = c.getColumnName(i);
String strColumnValue = c.getString(i);
}

//Delete the SMS
String pid = c.getString(1); //Get thread id;
String uri = "content://sms/conversations/" + pid;
mContext.getContentResolver().delete(Uri.parse(uri), null, null);

}

}
}

//把基本类功能性地应用起来
ContentResolver contentResolver = getContentResolver();// Context 环境下getContentResolver()
Handler handler = new SMSHandler();
ContentObserver m_SMSObserver = new SMSObserver(handler);
contentResolver.registerContentObserver(Uri.parse("content://sms/inbox"),true, m_SMSObserver);
//Register to observe SMS in outbox,we can observe SMS in other location by changing Uri string, such as inbox, sent, draft, outbox, etc.)

// some Available Uri string for sms.

REMEBER: must request following permission
1) Read SMS
<uses-permssion android:name="android.permission.READ_SMS" />
2) Delete/Modify/Send SMS
<uses-permssion android:name="android.permission.WRITE_SMS" />
in AndroidManifest.xml

2012年12月2日星期日

Android Code Producer 0.3

下載: https://docs.google.com/file/d/0B6sL60kI5J0md05nWGtBbTFtbHM/edit
(進入上面網址後按"檔案>下載")

Doc Folder root: https://docs.google.com/folder/d/0B6sL60kI5J0mTno0S3J0bm1qY0U/edit

消息模式Toast.makeText用法

Toast用于向用户显示一些帮助/提示。下面我做了5中效果，来说明Toast的强大，定义一个属于你自己的Toast。
1.默认效果

代码

Toast.makeText(getApplicationContext(), "默认Toast样式",
Toast.LENGTH_SHORT).show();

2.自定义显示位置效果

代码

toast = Toast.makeText(getApplicationContext(),
     "自定义位置Toast", Toast.LENGTH_LONG);
   toast.setGravity(Gravity.CENTER, 0, 0);
   toast.show();

3.带图片效果

代码

toast = Toast.makeText(getApplicationContext(),
     "带图片的Toast", Toast.LENGTH_LONG);
   toast.setGravity(Gravity.CENTER, 0, 0);
   LinearLayout toastView = (LinearLayout) toast.getView();
   ImageView imageCodeProject = new ImageView(getApplicationContext());
   imageCodeProject.setImageResource(R.drawable.icon);
   toastView.addView(imageCodeProject, 0);
   toast.show();

4.完全自定义效果

代码

LayoutInflater inflater = getLayoutInflater();
   View layout = inflater.inflate(R.layout.custom,
     (ViewGroup) findViewById(R.id.llToast));
   ImageView image = (ImageView) layout
     .findViewById(R.id.tvImageToast);
   image.setImageResource(R.drawable.icon);
   TextView title = (TextView) layout.findViewById(R.id.tvTitleToast);
   title.setText("Attention");
   TextView text = (TextView) layout.findViewById(R.id.tvTextToast);
   text.setText("完全自定义Toast");
   toast = new Toast(getApplicationContext());
   toast.setGravity(Gravity.RIGHT | Gravity.TOP, 12, 40);
   toast.setDuration(Toast.LENGTH_LONG);
   toast.setView(layout);
   toast.show();

5.其他线程

代码

new Thread(new Runnable() {
    public void run() {
     showToast();
    }
   }).start();

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2012年12月7日 星期五

2012年12月6日 星期四

2012年12月5日 星期三

2012年12月2日 星期日

2012年12月7日星期五

2012年12月6日星期四

2012年12月5日星期三

2012年12月2日星期日