android 实现发送短信功能

布局如图：        To：________________             //输入手机号                             _______________ Send            //输入短信内容，点击Send按钮发送信息

<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:text="To:"
android:padding="10dp"/>
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/to"
android:layout_weight="1"
android:layout_gravity="center_vertical"/>
</LinearLayout>

<LinearLayout
android:layout_width="match_parent"
android:layout_height="50dp">

<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:layout_gravity="center_vertical"
android:padding="10dp"
android:id="@+id/msg_input"/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/send"
android:text="Send"
android:textAllCaps="false"
/>
</LinearLayout>

在MainActivity中：

send=(Button)findViewById(R.id.send);
to=(EditText)findViewById(R.id.to);
msgInput=(EditText)findViewById(R.id.msg_input);
sendFilter=new IntentFilter();
sendFilter.addAction("SENT_SMS_ACTION");
sendStatusReceiver=new SendStatusReceiver();
registerReceiver(sendStatusReceiver,sendFilter);
send.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
SmsManager smsManager=SmsManager.getDefault();//获取SmsManager的实例
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(sendStatusReceiver);
}
class SendStatusReceiver extends BroadcastReceiver{
@Override
public void onReceive(Context context,Intent intent){
if(getResultCode()==RESULT_OK){//短信发送成功
Toast.makeText(context,"Send succeeded",Toast.LENGTH_LONG).show();
to.setText("");          //短信发送后清除其内容
msgInput.setText("");
}else{
Toast.makeText(context,"Send failed",Toast.LENGTH_LONG).show();
}
}
}
}

声明权限：

<uses-permission android:name="android.permission.SEND_SMS"/>