Android菜鸟笔记02:短信发送器

一，界面：

 

二，需求：输入电话号码和发送内容后，“发送”按钮发送短信

三，知识点：

1，根据id查找View

2，为按钮添加点击事件

3，通过SmsManager api发送短信

4,Toast

四，注意点：发送短信有字数限制，需要对短信内容拆分

 

五，代码：

MainActivity.java ：

package im.qvod.sms;

import java.util.ArrayList;

import android.os.Bundle;
import android.app.Activity;
import android.telephony.SmsManager;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class MainActivity extends Activity {
    private EditText numEdit;
    private EditText contentEdit;
    private Button button;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        numEdit = (EditText) this.findViewById(R.id.numEdit);
        contentEdit = (EditText) this.findViewById(R.id.contentEdit);
        button = (Button) this.findViewById(R.id.button);
        button.setOnClickListener(new OnClickListener() {
            public void onClick(View v) {
                String num = numEdit.getText().toString();
                String content = contentEdit.getText().toString();
                SmsManager manager = SmsManager.getDefault();
                ArrayList<String> contents = manager.divideMessage(content);
                for (String text : contents) {
                    manager.sendTextMessage(num, null, text, null, null);
                }
                Toast.makeText(MainActivity.this, R.string.success,
                        Toast.LENGTH_LONG).show();
            }
        });
    }

    @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;
    }

}

activity_main.xml ：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/num" />

    <EditText
        android:id="@+id/numEdit"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="@string/numEditHitnt" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/content" />

    <EditText
        android:id="@+id/contentEdit"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="@string/contentEditHitnt"
        android:minLines="3" />

    <Button
        android:id="@+id/button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/button" />

</LinearLayout>