【Android Studio】实现简易猴子摘桃功能

\app\src\main\AndroidManifest.xml

\app\src\main\java\com\example\peach\MainActivity.java

package com.example.peach;
import androidx.activity.result.ActivityResult;
import androidx.activity.result.ActivityResultCallback;
import androidx.activity.result.ActivityResultLauncher;
import androidx.activity.result.contract.ActivityResultContracts;
import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
    private Button pickBtn;
    private TextView peachTotal;
    int count=0;
    private ActivityResultLauncher launcher = registerForActivityResult(new ActivityResultContracts.StartActivityForResult(), new ActivityResultCallback() {
        @Override
        public void onActivityResult(ActivityResult result) {
            if(result != null){
                if(result.getResultCode() == RESULT_OK){
                    Intent data = result.getData();
                    int peachNum = data.getIntExtra("peachNum", 0);
                    Log.i("MainActivity", "onActivityResult: "+ peachNum);
                    count = count + peachNum;
                    peachTotal.setText("桃子" + count + "个");
                }
            }
        }
    });
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        pickBtn = findViewById(R.id.pick_btn);
        peachTotal = findViewById(R.id.peach_total);
        pickBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent i = new Intent(MainActivity.this, PeachActivity.class);
                launcher.launch(i);
            }
        });
    }
}

\app\src\main\java\com\example\peach\PeachActivity.java

package com.example.peach;
import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
public class PeachActivity extends AppCompatActivity implements View.OnClickListener {
    private ImageView peach1,peach2,peach3,peach4,peach5,peach6;
    private Button exitBtn;
    private int num = 0;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_peach);
        peach1 = findViewById(R.id.peach1);
        peach2 = findViewById(R.id.peach2);
        peach3 = findViewById(R.id.peach3);
        peach4 = findViewById(R.id.peach4);
        peach5 = findViewById(R.id.peach5);
        peach6 = findViewById(R.id.peach6);
        exitBtn = findViewById(R.id.exit_btn);
        peach1.setOnClickListener(this);
        peach2.setOnClickListener(this);
        peach3.setOnClickListener(this);
        peach4.setOnClickListener(this);
        peach5.setOnClickListener(this);
        peach6.setOnClickListener(this);
        exitBtn.setOnClickListener(this);
    }
    @Override
    public void onClick(View view) {
        if(view.getId() == R.id.peach1){
            info(peach1);
        }else if(view.getId() == R.id.peach2){
            info(peach2);
        }else if(view.getId() == R.id.peach3){
            info(peach3);
        }else if(view.getId() == R.id.peach4){
            info(peach4);
        }else if(view.getId() == R.id.peach5){
            info(peach5);
        }else if(view.getId() == R.id.peach6){
            info(peach6);
        }else if(view.getId() == R.id.exit_btn){
            returnData();
        }
    }
    private void returnData() {
        Intent i = new Intent();
        i.putExtra("peachNum", num);
        setResult(RESULT_OK,i);
        finish();
    }
    private void info(ImageView imageView) {
        imageView.setVisibility(View.INVISIBLE);
        num++;
    }
    @Override
    public void onBackPressed() {
        Intent i = new Intent();
        i.putExtra("peachNum", num);
        setResult(RESULT_OK,i);
        finish();
    }
}

\app\src\main\res\values\themes.xml

    
    
        
        @color/purple_500
        @color/purple_700
        @color/white
        
        @color/teal_200
        @color/teal_700
        @color/black
        
        ?attr/colorPrimaryVariant
        
    

\app\src\main\res\layout\activity_main.xml

\app\src\main\res\layout\activity_peach.xml