18.意图的跳转，拨号，短信，网页，

本次实例实现能够通过意图进行页面的跳转，拨打电话，发送短信，跳转网页，

进行操作的文件有

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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: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="com.example.xialm.intent_jump_call_sms_web.MainActivity">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello World!" />
</RelativeLayout>

lin.xml

 

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <Button
        android:id="@+id/btn_start"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="显示跳转"
        />
    <Button
        android:id="@+id/btn_call"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="拨打电话"
        />
    <Button
        android:id="@+id/btn_send"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="发送短信"
        />
    <Button
        android:id="@+id/btn_web"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="打开网页"
        />


</LinearLayout>

 

java代码

MainActivity

package com.example.xialm.intent_jump_call_sms_web;

import android.content.ComponentName;
import android.content.Intent;
import android.net.Uri;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

public class MainActivity extends AppCompatActivity {
    private Button b1,b2,b3,b4;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.lin);

        //找到关心的控件
        //开始，打电话，发短信，网页
        b2 = (Button)findViewById(R.id.btn_call);
        b3 = (Button)findViewById(R.id.btn_send);
        b1 = (Button)findViewById(R.id.btn_start);
        b4 = (Button)findViewById(R.id.btn_web);

        //点击开始
        b1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View arg0) {
                // TODO Auto-generated method stub
                //跳转界面
                //Intent ii = new Intent(MainActivity.this,second.class);
                //startActivity(ii);
                Intent in1 = new Intent();
                ComponentName my = new ComponentName(MainActivity.this,second.class);
                in1.setComponent(my);
                startActivity(in1);

            }
        });

        b2.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View arg0) {
                // TODO Auto-generated method stub
                //动作，数据来源
                Intent in2 = new Intent(Intent.ACTION_CALL, Uri.parse("tel://138"));
                startActivity(in2);
            }
        });

        b3.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View arg0) {
                // TODO Auto-generated method stub
                //动作，数据来源
                Intent in3 = new Intent(Intent.ACTION_SENDTO, Uri.parse("sms:13853485950"));
                //设置意图的附加数据
                in3.putExtra("短信内容", "666");

                startActivity(in3);
            }
        });

        //链接网络，可直接登录网站，
        b4.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View arg0) {
                // TODO Auto-generated method stub


                //Intent in4 = new Intent(Intent.ACTION_VIEW, Uri.parse("http://www.baidu.com"));
                //startActivity(in4);

                //可以一行代码实现，
                startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("https://www.cnblogs.com/gzyx/category/1560315.html")));
            }
        });
    }
}

second.class

package com.example.xialm.intent_jump_call_sms_web;

import android.app.Activity;
import android.os.Bundle;

/**
 * Created by xialm on 2019/11/5.
 */
public class second extends Activity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }
}

Mainfest中需要添加的权限有

    <uses-permission android:name="android.permission.CALL_PHONE"/>
    <uses-permission android:name="android.permission.INTERNET"/>
    <!--  发送消息-->
    <uses-permission android:name="android.permission.SEND_SMS"/>
    <!--  阅读消息-->
    <uses-permission android:name="android.permission.READ_SMS"/>
    <!--  写入消息-->
    <uses-permission android:name="android.permission.WRITE_SMS" />
    <!-- 接收消息 -->
    <uses-permission android:name="android.permission.RECEIVE_SMS" />

 

 

 

来源：https://www.cnblogs.com/gzyx/p/11808597.html