Android Studio 实战演练—小猴子摘桃

activity_main.xml

activity_mian.xml运行界面

PeachActivity.xml代码

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() {
        //定义点击事件，然后获取统计个数
         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);
        //点击事件
        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);
        //关闭进程
        PeachActivity.this.finish();
    }
    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if (keyCode == KeyEvent.KEYCODE_BACK && event.getRepeatCount()==0);
        re();
        return false;
    }
}