第七周

转载

mb5ff590c45613d 2021-10-07 21:45:00

文章标签 android xml ide bundle .net 文章分类 代码人生

com.example.wyn;

import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class MainActivity extends Activity {

    Button btn;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        btn=(Button) findViewById(R.id.btn1);
        btn.setOnClickListener(new OnClickListener() {
            
            public void onClick(View v) {
                // TODO Auto-generated method stub
                Intent i = new Intent(MainActivity.this,MainActivity2.class);
                startActivity(i);
            }
        });
    }
        


  
    
}




package com.example.wyn;

import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class MainActivity2 extends Activity {

    Button btn1;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main_activity2);
         btn1=(Button) findViewById(R.id.btn2);
            btn1.setOnClickListener(new OnClickListener() {
                
                public void onClick(View v) {
                    // TODO Auto-generated method stub
                    Intent i = new Intent();
                    i.setAction("cn.itcast.startactivity");
                    i.addCategory("android.intent.category.DEFAULT");
                    startActivity(i);
                }
            });
        
    }

    @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_activity2, menu);
        return true;
    }

}



package com.example.wyn;

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

public class MainActivity3 extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main_activity3);
    }

    @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_activity3, menu);
        return true;
    }

}

<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: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" >

    <Button
        android:id="@+id/btn1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
         />
      <TextView 
         android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="1"/>
    

</LinearLayout>



<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: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=".MainActivity2" >

    <Button
        android:id="@+id/btn2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
         />
    <TextView 
         android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="2"/>

</LinearLayout>



<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: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=".MainActivity3" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello_world" />
    <TextView 
         android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="3"/>

</LinearLayout>

<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: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" >

    <Button
        android:id="@+id/btn1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
         />
      <TextView 
         android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="1"/>
    

</LinearLayout>



<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: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=".MainActivity2" >

    <Button
        android:id="@+id/btn2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
         />
    <TextView 
         android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="2"/>

</LinearLayout>



<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: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=".MainActivity3" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello_world" />
    <TextView 
         android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="3"/>

</LinearLayout>

第七周_ide

package com.example.wyn;

import android.net.Uri;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class MainActivity extends Activity {

    Button btn;
    Button btn2;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        btn=(Button) findViewById(R.id.btn1);
        btn.setOnClickListener(new OnClickListener() {
            
            public void onClick(View v) {
                // TODO Auto-generated method stub
                Intent i = new Intent(MainActivity.this,MainActivity2.class);
                startActivity(i);
            }
        });
        btn2=(Button) findViewById(R.id.btnllq);
        btn2.setOnClickListener(new OnClickListener() {
            
            public void onClick(View v) {
                // TODO Auto-generated method stub
                Intent i = new Intent();
                i.setAction("android.intent.action.VIEW");
                i.setData(Uri.parse("http://www.baidu.com"));
                startActivity(i);
            }
        });
    }
        


  
    
}
3.

package com.example.aswork1;

import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

import androidx.appcompat.app.AppCompatActivity;

public class MainActivity3 extends AppCompatActivity {
    EditText et1;
    EditText et2;
    Button btn1;
    Button btn2;
    Button btn3;
    Button btn4;
    TextView tv1;
    String str1;
    String str2;
    int a;
    int b;

    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main3);
        et1=findViewById(R.id.et1);
        et2=findViewById(R.id.et2);
        btn1=findViewById(R.id.btn1);
        btn2=findViewById(R.id.btn2);
        btn3=findViewById(R.id.btn3);
        btn4=findViewById(R.id.btn4);
        tv1=findViewById(R.id.tv1);
        btn1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                str1=et1.getText().toString();
                str2=et2.getText().toString();
                a=Integer.parseInt(str1);
                b=Integer.parseInt(str2);
                String str3=""+(a+b);

                tv1.setText(str3);
            }
        });
        btn2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                str1=et1.getText().toString();
                str2=et2.getText().toString();
                a=Integer.parseInt(str1);
                b=Integer.parseInt(str2);
                String str3=""+(a-b);

                tv1.setText(str3);
            }
        });
        btn3.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                str1=et1.getText().toString();
                str2=et2.getText().toString();
                a=Integer.parseInt(str1);
                b=Integer.parseInt(str2);
                String str3=""+(a*b);

                tv1.setText(str3);
            }
        });
        btn4.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                str1=et1.getText().toString();
                str2=et2.getText().toString();
                a=Integer.parseInt(str1);
                b=Integer.parseInt(str2);
                String str3=""+(a/b);

                tv1.setText(str3);
            }
        });

}
}

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