週末閒着無聊,就自學了markdown,不太嫺熟,但願之後慢慢進步。java
上個週末我把咱們項目的安卓端的註冊和登陸界面實現了,而後本身把安卓的廣播方面看了下,能實現雙發發送信息了,原理就是調用系統的發送與接受消息的權限。android
分爲兩步實現:git
接受消息
發送消息github
當手機接受到一條消息的時候,系統會發出廣播,這條廣播攜帶者信息相關的數據。
先設計一組文字from和content表示來自某某和信息的內容的界面markdown
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <LinearLayout android:layout_width="match_parent" android:layout_height="50dp" > //顯示文字from <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center_vertical" android:padding="10dp" android:text="from:" /> //顯示文字接受框 <TextView android:id="@+id/sender" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center_vertical" /> </LinearLayout> <LinearLayout android:layout_width="match_parent" android:layout_height="50dp" > //顯示文字content <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center_vertical" android:padding="10dp" android:text="Content:" /> //顯示接受框 <TextView android:id="@+id/content" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center_vertical" /> </LinearLayout>
這只是頁面佈局,固然還要在main裏面進行建立廣播接收系統接受系統發出的廣播。在清單文件裏註冊。app
在模擬器能進行端進行模擬來消息
ide
再次在界面中加入文字輸入框和send按鈕工具
<LinearLayout android:layout_width="match_parent" android:layout_height="50dp" > <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center_vertical" android:padding="10dp" android:text="to:" /> <EditText android:id="@+id/to" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_gravity="center_vertical" android:layout_weight="1" /> </LinearLayout> <LinearLayout android:layout_width="match_parent" android:layout_height="50dp" > <EditText android:id="@+id/msg_input" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_gravity="center_vertical" android:layout_weight="1" /> <Button android:id="@+id/send" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center_vertical" android:text="Send" /> </LinearLayout>
再次在main文件中加入相應事件,再在清單中註冊。就能夠實現發送短信的功能。
佈局
小結:感受學習一門新技術主要是要靜下來看看書,而後不斷上手實踐代碼效果。感受這周最大的收穫就是實現手機端的通訊。瞭解了許多安卓的原理,關於佈局,通訊,活動的銜接。而後儘可能多去掌握一些工具性質的東西,一開始感受markdown應該會比較難學吧,可是因爲沒什麼事,而後本身就試着學了下,感受並不難,看了幾篇文檔也算小小的入個門。這裏給個連接markdown入門我本身看了而後本身實踐了一會兒,感受挺簡單的,不用再進行調字體格式啥的,挺方便的。學習
接下來這是三個文件的總代碼:
first.main文件
import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; public class First extends Activity { private Button button; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.first_layout); Button button = (Button) findViewById(R.id.button); button.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { Intent intent = new Intent(First.this,MainActivity.class); startActivity(intent); } }); } }
MainActivity.main文件
import android.app.Activity; import android.app.PendingIntent; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.os.Bundle; import android.os.Message; import android.telephony.gsm.SmsManager; import android.telephony.gsm.SmsMessage; import android.test.suitebuilder.annotation.SmallTest; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.TextView; import android.widget.Toast; import android.view.View.OnClickListener; @SuppressWarnings("deprecation") public class MainActivity extends Activity { private TextView sender; private EditText to; private EditText msgInput; private Button send; private TextView content; private IntentFilter receiveFilter; private IntentFilter sendFilter; private MesseagReceiver messageReceiver; private SendStatusReceiver sendStatusReceiver; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); sender = (TextView) findViewById(R.id.sender); content = (TextView) findViewById(R.id.content); receiveFilter = new IntentFilter(); receiveFilter.addAction("android.provider.Telephony.SMS_RECEIVED"); messageReceiver = new MesseagReceiver(); registerReceiver(messageReceiver, receiveFilter); to = (EditText) findViewById(R.id.to); msgInput = (EditText) findViewById(R.id.msg_input); send = (Button) findViewById(R.id.send); sendFilter = new IntentFilter(); sendFilter.addAction("SENT_SMS_ACTION"); registerReceiver((BroadcastReceiver) sendStatusReceiver, sendFilter); send.setOnClickListener(new OnClickListener() { public void onClick(View v) { SmsManager smsManager = SmsManager.getDefault(); smsManager.sendTextMessage(to.getText().toString(), null, msgInput.getText().toString(), null, null); Intent sentIntent = new Intent("SENT_SMS_ACTION"); PendingIntent pi = PendingIntent.getBroadcast(MainActivity.this, 0, sentIntent, 0); smsManager.sendTextMessage(to.getText().toString(), null, msgInput.getText().toString(), pi, null); } }); } @Override protected void onDestroy() { super.onDestroy(); unregisterReceiver(messageReceiver); unregisterReceiver((BroadcastReceiver) sendStatusReceiver); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.main, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { // Handle action bar item clicks here. The action bar will // automatically handle clicks on the Home/Up button, so long // as you specify a parent activity in AndroidManifest.xml. int id = item.getItemId(); if (id == R.id.action_settings) { return true; } return super.onOptionsItemSelected(item); } class MesseagReceiver extends BroadcastReceiver { @Override public void onReceive(Context context, Intent intent) { Bundle bundle = intent.getExtras(); Object[] pdus = (Object[]) bundle.get("pdus"); SmsMessage[] messages = new SmsMessage[pdus.length]; for (int i = 0; i < messages.length; i++) { messages[i] = SmsMessage.createFromPdu((byte[]) pdus[i]); } String address = messages[0].getOriginatingAddress(); String fullMessage = ""; for (SmsMessage message : messages) { fullMessage += message.getMessageBody(); } sender.setText(address); content.setText(fullMessage); } } class SendStatusReceiver extends BroadcastReceiver { @Override public void onReceive(Context context, Intent intent) { if (getResultCode() == RESULT_OK) { Toast.makeText(context, "Send succeeded", Toast.LENGTH_LONG).show(); } else { Toast.makeText(context, "Send failed", Toast.LENGTH_LONG).show(); } } } }
剛剛的接受發信息界面代碼已經給出,這是前面的登錄與註冊界面代碼:
<TableLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:stretchColumns="1" > <TableRow> <TextView android:layout_height="wrap_content" android:text="Account" /> <EditText android:id="@+id/account" android:layout_height="wrap_content" android:hint="Input your account" /> </TableRow> <TableRow> <TextView android:layout_height="wrap_content" android:text="Password" /> <EditText android:id="@+id/password" android:layout_height="wrap_content" android:ems="10" android:inputType="textPassword" /> </TableRow> <TableRow> <Button android:id="@+id/login" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="1" android:text="register" /> <Button android:id="@+id/button" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="1" android:text="login" /> </TableRow> </TableLayout>
這是清單文件:
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.smstest" android:versionCode="1" android:versionName="1.0" > <uses-permission android:name="android.permission.RECEIVE_SMS" /> <uses-permission android:name="android.permission.SEND_SMS" /> <uses-sdk android:minSdkVersion="17" android:targetSdkVersion="21" /> <application android:allowBackup="true" android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" > <activity android:name=".First" android:label="@string/app_name" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <activity android:name=".MainActivity" > </activity> </application> </manifest>