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;    }}