<?xml version="1.0" encoding="utf-8"?>
 <LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:tools="http://schemas.android.com/tools"
 android:id="@+id/activity_main"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:orientation="vertical"
tools:context="com.example.administrator.sendshare.MainActivity">
 <EditText
 android:id="@+id/et"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:hint="想给潘侯爷说点什么"/>
 <Button
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:onClick="sendtext"
 android:text="发送文本" />
</LinearLayout>

public class MainActivity extends AppCompatActivity {
 EditText et;//声明文本编辑框
 String str;//声明字符串，用于获取文本编辑框内的内容
 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);
 //获取文本框
 et = (EditText) findViewById(R.id.et);
 }
 //创建方法将输入的内容发出去
 public void sendtext(View view){
 str=et.getText().toString();
 Intent intent = new Intent();
 /*设置action为发送分享，
 *并判断要发送分享的内容是否为空
  */
 intent.setAction(Intent.ACTION_SEND);
 if(str!=null){
  intent.putExtra(Intent.EXTRA_TEXT,str);
 }else{
  intent.putExtra(Intent.EXTRA_TEXT,"");
 }
 intent.setType("text/plain");//设置分享发送的数据类型
 //未指定选择器，部分定制系统首次选择后，后期将无法再次改变
// startActivity(intent);
 //指定选择器选择使用有发送文本功能的App
 startActivity(Intent.createChooser(intent,getResources().getText(R.string.app_name)));
 }
}

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
 package="com.example.administrator.test" >
 <application
 android:allowBackup="true"
 android:icon="@mipmap/ic_launcher"
 android:label="@string/app_name"
 android:supportsRtl="true"
 android:theme="@style/AppTheme" >
 <activity android:name=".MainActivity" >
  <intent-filter>
  <action android:name="android.intent.action.MAIN" />
  //添加接收文本用的action，category，mimeType
  <action android:name="android.intent.action.SEND" />
  <category android:name="android.intent.category.DEFAULT" />
  <data android:mimeType="text/plain" />
  <category android:name="android.intent.category.LAUNCHER" />
  </intent-filter>
 </activity>
 </application>
</manifest>

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
 private TextView tv;
 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);
 tv = (TextView) findViewById(R.id.tv);
 //获取intent
 Intent intent =getIntent();
 String action = intent.getAction();
 String type = intent.getType();
 //设置接收类型为文本
 if (Intent.ACTION_SEND.equals(action) && type != null){
  if ("text/plain".equals(type)) {
  handlerText(intent);
  }
 }
}
//该方法用于获取intent所包含的文本信息，并显示到APP的Activity界面上
 private void handlerText(Intent intent) {
 String data = intent.getStringExtra(Intent.EXTRA_TEXT);
 tv.setText(data);
 }
}

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
public class Main2Activity extends AppCompatActivity {
 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main2);
 }
 public void select(View view){
 Intent intent = new Intent();
 intent.setAction(Intent.ACTION_SET_WALLPAPER);
 startActivity(Intent.createChooser(intent,getResources().getText(R.string.app_name)));
// startActivity(intent);
 }
}

public void sendimage(View view) {
 Intent intent = new Intent();
 intent.setAction(Intent.ACTION_SEND);
 intent.putExtra(Intent.EXTRA_STREAM, Uri.parse(Environment.getExternalStorageDirectory()+"/DCIM/Camera/20161204_195228.jpg"));
 intent.setType("image/*");
// startActivity(intent);
 startActivity(Intent.createChooser(intent,getResources().getText(R.string.app_name)));
}

public void sendimages(View view) {
 ArrayList<Uri> uris = new ArrayList<>();
 //演示发送两张图片
 uris.add(Uri.parse(Environment.getExternalStorageDirectory()+"/DCIM/Camera/20161204_195228.jpg"));
 uris.add(Uri.parse(Environment.getExternalStorageDirectory()+"/DCIM/Camera/20161204_195155.jpg"));
 Intent intent = new Intent();
 intent.setAction(Intent.ACTION_SEND_MULTIPLE);
 intent.putParcelableArrayListExtra(Intent.EXTRA_STREAM,uris);
 intent.setType("image/*");
// startActivity(intent);
 startActivity(Intent.createChooser(intent,getResources().getText(R.string.app_name)));
}