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activity跳转例子

2020-04-30 分类于 作者 xybz

纯跳转代码，不包含逻辑

文件目录

两个样式文件

activity_main.xml

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<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity" >

    <ImageView
        android:id="@+id/iv"
        android:layout_width="70dp"
        android:layout_height="70dp"
        android:layout_centerHorizontal="true"
        android:layout_margin="40dp"
        android:background="@drawable/head"/>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_below="@id/iv"
        android:layout_centerHorizontal="true"
        android:layout_marginBottom="5dp"
        android:layout_marginLeft="10dp"
        android:layout_marginRight="10dp"
        android:layout_marginTop="15dp"
        android:orientation="vertical">

        <EditText
            android:id="@+id/et1"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:padding="10dp"
            android:ems="10"
            android:hint="QQ号/手机号/邮箱"
            android:inputType="textPersonName"
            android:textColor="#615C5C"
            android:textColorHint="#FFC4BABA"
            android:textSize="18sp"/>

        <EditText
            android:id="@+id/et2"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:padding="10dp"
            android:ems="10"
            android:hint="密码"
            android:inputType="textPassword"
            android:selectAllOnFocus="false"
            android:singleLine="false"
            android:textColor="#FFC4BABA"
            android:textColorHint="#FFC4BABA"/>

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="horizontal">

            <Button
                android:id="@+id/bt1"
                android:layout_width="0dp"
                android:layout_weight="1"
                android:layout_height="wrap_content"
                android:layout_marginTop="50dp"
                android:layout_marginLeft="10dp"
                android:layout_marginRight="10dp"
                android:text="登录" />

            <Button
                android:id="@+id/bt2"
                android:layout_width="0dp"
                android:layout_weight="1"
                android:layout_height="wrap_content"
                android:layout_marginTop="50dp"
                android:layout_marginLeft="10dp"
                android:layout_marginRight="10dp"
                android:text="新用户注册" />
        </LinearLayout>
    </LinearLayout>
</RelativeLayout>

sign_success.xml

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<?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">

    <TextView
        android:id="@+id/tv"
        android:layout_width="wrap_content"
        android:layout_height="86dp"
        android:layout_weight="1"
        android:text="登录成功" />
</LinearLayout>

两个activity文件

MainActivity

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package com.example.myapplication1;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.util.Log;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import android.content.Intent;
import android.view.View;
import android.view.View.OnClickListener;

public class MainActivity extends AppCompatActivity {
    private static final String TGA="ActivityLife";
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Log.e(TGA,"1-onCreate");

        ImageView iv=(ImageView)this.findViewById(R.id.iv);

        TextView et1= (TextView)this.findViewById(R.id.et1);
        TextView et2= (TextView)this.findViewById(R.id.et2);

        Button bt1= (Button)this.findViewById(R.id.bt1);
        Button bt2= (Button)this.findViewById(R.id.bt2);

        bt1.setOnClickListener(new OnClickListener() {
            public void onClick(View v) {
                //显示声明Intent
                Intent intent = new Intent(MainActivity.this, signActivity.class);
                startActivity(intent);
            }
        });

    }
    @Override
    protected void onStart(){
        super.onStart();
        Log.e(TGA,"1-onStart");
    }
    @Override
    protected void onResume(){
        super.onResume();
        Log.e(TGA,"1-onResume");
    }
    @Override
    protected void onRestart(){
        super.onRestart();
        Log.e(TGA,"1-onRestart");
    }
    @Override
    protected void onPause(){
        super.onPause();
        Log.e(TGA,"1-onPause");
    }
    @Override
    protected void onStop(){
        super.onStop();
        Log.e(TGA,"1-onStop");
    }
}

signActivity

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package com.example.myapplication1;

import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;

public class signActivity extends AppCompatActivity {
    private static final String TGA="ActivityLife";
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.sign_success);
    }
    @Override
    protected void onStart(){
        super.onStart();
        Log.e(TGA,"2-onStart");
    }
    @Override
    protected void onResume(){
        super.onResume();
        Log.e(TGA,"2-onResume");
    }
    @Override
    protected void onRestart(){
        super.onRestart();
        Log.e(TGA,"2-onRestart");
    }
    @Override
    protected void onPause(){
        super.onPause();
        Log.e(TGA,"2-onPause");
    }
    @Override
    protected void onStop(){
        super.onStop();
        Log.e(TGA,"2-onStop");
    }
}

在AndroidManifest中注册两个Activity

AndroidManifest.xml

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<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:dist="http://schemas.android.com/apk/distribution"
package="com.example.myapplication1">

<dist:module dist:instant="true" />

<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="myqq"
    android:roundIcon="@mipmap/ic_launcher_round"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">
    <activity android:name=".MainActivity">
    <intent-filter>
        <action android:name="android.intent.action.MAIN" />
        <category android:name="android.intent.category.LAUNCHER" />
    </intent-filter>
    </activity>
    <activity android:name=".signActivity"></activity>
</application>
</manifest>

结果

生命周期

打开app

点击登录

返回主页面

关闭

数据传递

要实现传递et1框内输入的数据只需更改两个Activity

MainActivity

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package com.example.myapplication1;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.util.Log;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import android.content.Intent;
import android.view.View;
import android.view.View.OnClickListener;

public class MainActivity extends AppCompatActivity {
    private static final String TGA="ActivityLife";
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Log.e(TGA,"1-onCreate");

        ImageView iv=(ImageView)this.findViewById(R.id.iv);

        final TextView et1= (TextView)this.findViewById(R.id.et1);
        TextView et2= (TextView)this.findViewById(R.id.et2);

        Button bt1= (Button)this.findViewById(R.id.bt1);
        Button bt2= (Button)this.findViewById(R.id.bt2);

        bt1.setOnClickListener(new OnClickListener() {
            public void onClick(View v) {
                String str=et1.getText().toString();
                //显示方式声明Intent
                Intent intent = new Intent(MainActivity.this, signActivity.class);
                intent.putExtra("data",str);
                startActivity(intent);
            }
        });

    }
    @Override
    protected void onStart(){
        super.onStart();
        Log.e(TGA,"1-onStart");
    }
    @Override
    protected void onResume(){
        super.onResume();
        Log.e(TGA,"1-onResume");
    }
    @Override
    protected void onRestart(){
        super.onRestart();
        Log.e(TGA,"1-onRestart");
    }
    @Override
    protected void onPause(){
        super.onPause();
        Log.e(TGA,"1-onPause");
    }
    @Override
    protected void onStop(){
        super.onStop();
        Log.e(TGA,"1-onStop");
    }
}

signActivity

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package com.example.myapplication1;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.content.Intent;
import android.widget.TextView;

public class signActivity extends AppCompatActivity {
    private static final String TGA="ActivityLife";
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.sign_success);
        //取得启动该Activity的Intent对象
        Intent intent =getIntent();
        /*取出Intent中附加的数据*/
        String str = intent.getStringExtra("data");
        TextView tv=(TextView) this.findViewById(R.id.tv);
        tv.setText(String.valueOf(str));
    }

    @Override
    protected void onStart(){
        super.onStart();
        Log.e(TGA,"2-onStart");
    }
    @Override
    protected void onResume(){
        super.onResume();
        Log.e(TGA,"2-onResume");
    }
    @Override
    protected void onRestart(){
        super.onRestart();
        Log.e(TGA,"2-onRestart");
    }
    @Override
    protected void onPause(){
        super.onPause();
        Log.e(TGA,"2-onPause");
    }
    @Override
    protected void onStop(){
        super.onStop();
        Log.e(TGA,"2-onStop");
    }
}

结果

本作品采用 知识共享署名-相同方式共享 4.0 国际许可协议 进行许可
最后编辑：2020-05-01