Android Studio 实战演练—小猴子摘桃

activity_main.xml

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

<LinearLayout 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"

android:orientation="vertical">

<TextView

android:layout_width="match_parent"

android:layout_height="50dp"

android:background="#008577"

android:gravity="center"

android:text="首页"

android:textColor="@android:color/white"

android:textSize="20sp" />

<RelativeLayout

android:layout_width="match_parent"

android:layout_height="match_parent"

android:background="@drawable/bg"

android:gravity="center_vertical">

<ImageView

android:id="@+id/iv_monkey"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:src="@drawable/monkey" />

<Button

android:id="@+id/btn_peach"

android:layout_width="80dp"

android:layout_height="40dp"

android:layout_marginLeft="30dp"

android:layout_marginTop="20dp"

android:layout_toRightOf="@id/iv_monkey"

android:background="@drawable/btn_peach"

android:text="去桃园"

android:textColor="@android:color/black" />

<ImageView

android:id="@+id/iv_peach"

android:layout_width="45dp"

android:layout_height="35dp"

android:layout_centerHorizontal="true"

android:layout_marginTop="80dp"

android:src="@drawable/peach_pic" />

<TextView

android:id="@+id/tv_count"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_marginTop="85dp"

android:layout_toRightOf="@id/iv_peach"

android:text="摘到0个"

android:textColor="@android:color/black"

android:textSize="16sp" />

</RelativeLayout>

</LinearLayout>

activity_mian.xml运行界面

PeachActivity.xml代码

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

<LinearLayout 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=".PeachActivity"

android:orientation="vertical">

<TextView

android:layout_width="match_parent"

android:layout_height="50dp"

android:background="#008577"

android:gravity="center"

android:text="桃园"

android:textColor="@android:color/white"

android:textSize="20sp" />

<RelativeLayout

android:layout_width="match_parent"

android:layout_height="match_parent"

android:background="@drawable/tree_bg">

<RelativeLayout

android:layout_width="227dp"

android:layout_height="254dp"

android:layout_centerInParent="true"

android:layout_marginTop="70dp"

android:background="@drawable/tree">

<Button

android:id="@+id/btn_one"

android:layout_width="45dp"

android:layout_height="35dp"

android:layout_marginLeft="85dp"

android:layout_marginTop="25dp"

android:background="@drawable/peach_pic" />

<Button

android:id="@+id/btn_two"

android:layout_width="45dp"

android:layout_height="35dp"

android:layout_below="@id/btn_one"

android:layout_marginLeft="50dp"

android:layout_marginTop="5dp"

android:background="@drawable/peach_pic" />

<Button

android:id="@+id/btn_three"

android:layout_width="45dp"

android:layout_height="35dp"

android:layout_below="@id/btn_one"

android:layout_marginLeft="25dp"

android:layout_marginTop="5dp"

android:layout_toRightOf="@id/btn_two"

android:background="@drawable/peach_pic" />

<Button

android:id="@+id/btn_four"

android:layout_width="45dp"

android:layout_height="35dp"

android:layout_below="@id/btn_two"

android:layout_marginLeft="15dp"

android:layout_marginTop="5dp"

android:background="@drawable/peach_pic" />

<Button

android:id="@+id/btn_five"

android:layout_width="45dp"

android:layout_height="35dp"

android:layout_below="@id/btn_two"

android:layout_marginLeft="25dp"

android:layout_marginTop="5dp"

android:layout_toRightOf="@id/btn_four"

android:background="@drawable/peach_pic" />

<Button

android:id="@+id/btn_six"

android:layout_width="45dp"

android:layout_height="35dp"

android:layout_below="@id/btn_two"

android:layout_marginLeft="25dp"

android:layout_marginTop="5dp"

android:layout_toRightOf="@id/btn_five"

android:background="@drawable/peach_pic" />

</RelativeLayout>

<Button

android:id="@+id/btn_exit"

android:layout_width="80dp"

android:layout_height="40dp"

android:layout_alignParentRight="true"

android:layout_alignParentBottom="true"

android:layout_marginStart="50dp"

android:layout_marginTop="50dp"

android:layout_marginEnd="50dp"

android:layout_marginBottom="50dp"

android:background="@drawable/btn_peach"

android:text="退出桃园"

android:textColor="@android:color/black" />

</RelativeLayout>

</LinearLayout>

PeachActivity.xml运行界面

MainActivity.java文件

package cn.itcast.pickpeach;

import androidx.annotation.Nullable;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;

import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

private Button btn_peach;

private TextView tv_count;

private int totalCount = 0;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

init();

}

private void init() {

btn_peach = findViewById(R.id.btn_peach);

tv_count = findViewById(R.id.tv_count);

btn_peach.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View view) {

Intent intent = new Intent(MainActivity.this,PeachActivity.class);

startActivityForResult(intent,1);

}

});

}

@Override

protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {

super.onActivityResult(requestCode, resultCode, data);

if (requestCode == 1 && requestCode ==1){

int count = data.getIntExtra("count",0);

totalCount = totalCount+count;

tv_count.setText("摘到"+totalCount+"个");

}

}

}

 PeachActivity.java文件

package cn.itcast.pickpeach;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;

import android.os.Bundle;

import android.view.KeyEvent;

import android.view.View;

import android.widget.Button;

import android.widget.Toast;

public class PeachActivity extends AppCompatActivity implements View.OnClickListener {

private int count = 0;

private Button btn_one,btn_two,btn_three,btn_four,btn_five,btn_six,btn_exit;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_peach);

init();

}

private void init() {

btn_one = findViewById(R.id.btn_one);

btn_two = findViewById(R.id.btn_two);

btn_three = findViewById(R.id.btn_three);

btn_four = findViewById(R.id.btn_four);

btn_five = findViewById(R.id.btn_five);

btn_six = findViewById(R.id.btn_six);

btn_exit = findViewById(R.id.btn_exit);

btn_one.setOnClickListener(PeachActivity.this);

btn_two.setOnClickListener(PeachActivity.this);

btn_three.setOnClickListener(PeachActivity.this);

btn_four.setOnClickListener(PeachActivity.this);

btn_six.setOnClickListener(PeachActivity.this);

btn_five.setOnClickListener(PeachActivity.this);

btn_exit.setOnClickListener(PeachActivity.this);

}

private void info(Button btn){

count++;

btn.setVisibility(View.INVISIBLE);

Toast.makeText(PeachActivity.this,"摘到"+"个桃子",Toast.LENGTH_LONG).show();

}

@Override

public void onClick(View view) {

switch (view.getId()){

case R.id.btn_one:

info(btn_one);

break;

case R.id.btn_two:

info(btn_two);

break;

case R.id.btn_three:

info(btn_three);

break;

case R.id.btn_four:

info(btn_four);

break;

case R.id.btn_five:

info(btn_five);

break;

case R.id.btn_six:

info(btn_six);

break;

case R.id.btn_exit:

info(btn_exit);

break;

}

}

private void re() {

Intent intent = new Intent();

intent.putExtra("count",count);

setResult(1,intent);

PeachActivity.this.finish();

}

@Override

public boolean onKeyDown(int keyCode, KeyEvent event) {

if (keyCode == KeyEvent.KEYCODE_BACK && event.getRepeatCount()==0);

re();

return false;

}

}