Android studio 实现界面跳转

Android studio 实现界面跳转
标签： 教育
主要大概实现的就是点击主界面的按钮可以跳转到指定界面
实现向10086打电话 发短信以及打开网页打开地图等功能

1.首先在activitiy_main.xml中设计主界面
代码如下：<?xml version="1.0" encoding="utf-8"?>









界面实现结果：

2.接着创建一个activity_second.xml作为跳转界面
界面代码如下：

<?xml version="1.0" encoding="utf-8"?>

界面实现结果如下：

3. 接着在MainActivity中编写界面跳转功能

代码如下：
package com.example.internetdemo;

import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;

import android.Manifest;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.os.Bundle;
import android.provider.AlarmClock;
import android.view.View;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {

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

public void click(View view) {
    switch (view.getId()){
        case R.id.btn_second:
            //根据Intent的action启动Activity
            Intent  intent=new Intent();
            intent.setAction("com.example.SECOND_ACTIVITY");
            startActivity(intent);
            break;

        case R.id.btn_call:
            //根据Intent的Action启动Activity
            callPhone();
             intent= new Intent(Intent.ACTION_DIAL);
            intent.setData(Uri.parse("tel:"+"10086"));
            startActivity(intent);

            break;
        case R.id.btn_message:
            sendMessage();
            break;
        case R.id.btn_browser:
            openBrowser();
            break;
        case R.id.btn_map:
            openMap();
            break;
        case R.id.btn_alarm:
            creatAlarm();
            break;
        case R.id.btn_textView:
            jumpSecond();
            break;    

    }

}

private void jumpSecond() {
    Intent intent=new Intent(MainActivity.this,SecondActivity.class);
    intent.putExtra("班级","软件1811");
    //2.通过Bundle传递复杂类型：对象、对象集合
    Bundle bundle = new Bundle();
    bundle.putSerializable("user",new User("张三","13801234567"));
    intent.putExtras(bundle);
    //3.通过Bunle传递对象集合
    ArrayList<User> users=new ArrayList<User>();
    users.add(new User("a","13092746578"));
    users.add(new User("b","13065986578"));
    users.add(new User("c","13092741126"));
    bundle.putSerializable("users",users);

    intent.putExtras(bundle);
    startActivityForResult(intent,101);


}

private void callPhone() {
    Intent intent= new Intent(Intent.ACTION_DIAL);
    intent.setData(Uri.parse("tel:"+"10086"));
    //检查运行时权限，若没有则申请，然后在毁掉函数中完成打电话功能
    if(ActivityCompat.checkSelfPermission(MainActivity.this, Manifest.permission.CALL_PHONE) != PackageManager.PERMISSION_GRANTED){
        ActivityCompat.requestPermissions(MainActivity.this,new String[]{Manifest.permission.CALL_PHONE},
                1);
    }else{
        if(intent.resolveActivity(getPackageManager()) !=null){
            startActivity(intent);
        }
    }

}

//闹钟需要设置权限
private void creatAlarm() {
Intent intent=new Intent(AlarmClock.ACTION_SET_ALARM)
.putExtra(AlarmClock.EXTRA_MESSAGE,“起床”)
.putExtra(AlarmClock.EXTRA_HOUR,6)
.putExtra(AlarmClock.EXTRA_MINUTES,0);
if(intent.resolveActivity(getPackageManager()) != null){
startActivity(intent);
}

}

private void openMap() {
    Uri uri=Uri.parse("geo:0?q=1600+Amphitheatre_Parkway,+Mountain+View,+California");
    Intent intent=new Intent(Intent.ACTION_VIEW,uri);
    startActivity(intent);
}

private void openBrowser() {
    Intent intent= new Intent(Intent.ACTION_VIEW);
    intent.setData(Uri.parse("https://www.baidu.com"));
    startActivity(intent);
}

private void sendMessage() {
    Intent intent = new Intent(Intent.ACTION_SENDTO) ;
    intent.setData (Uri.parse ("smsto:10086"));
    intent.putExtra("sms_body","10086,你好");
    startActivity(intent);
}

}
4.接着在SecondActivity中编写跳转之后的代码

代码如下：
package com.example.internetdemo;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class SecondActivity extends AppCompatActivity {
private TextView tvResult;
private EditText etPhone;
private User user;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_second);

    tvResult = findViewById(R.id.btn_textView);
    etPhone=findViewById(R.id.et_phone);
    Intent intent = getIntent();
    String classmate = intent.getStringExtra("班级");
    String result = classmate;

    Bundle extras = intent.getExtras();
    if(extras!=null){
        User user=(User) extras.getSerializable("user");
        if(user!=null){
            result += ","+user.toString();
            tvResult.setText(user.getName());
            etPhone.setText(user.getPhone());
        }
    }
    //通过按钮的事件监听器
    Button btnConfirm=findViewById(R.id.confirm);
    btnConfirm.setOnClickListener(new View.OnClickListener(){

        @Override
        public void onClick(View v) {
            //获取修改后的手机号，回传给MainActivity
            String phone=etPhone.getText().toString();
            if(user !=null){
                user.setPhone(phone);
                Intent intent=new Intent();
                Bundle bundle=new Bundle();
                bundle.putSerializable("user",user);
                setResult(RESULT_OK,intent);
                SecondActivity.this.finish();
            }
        }
    });
    tvResult.setText(result);
}

}
5.当然我们还需要建一个User的java类

User代码如下：
package com.example.internetdemo;

import java.io.Serializable;

public class User implements Serializable {
private int id;
private String name;
private String phone;
public User(){

}
public User(String name,String phone){

    this.name=name;
    this.phone=phone;
}

public int getId() {
    return id;
}

public void setId(int id) {
    this.id = id;
}

public String getName() {
    return name;
}

public void setName(String name) {
    this.name = name;
}

public String getPhone() {
    return phone;
}

public void setPhone(String phone) {
    this.phone = phone;
}

}

6.最后我们就可以在模拟器中运行啦

点击发短信会出现这样的界面

点击打电话会出现这样的界面

这个我就不一 一演示啦 简单举两个例子
这样我们就简单完成一个小功能啦！！