Android------startActivityForResult的详细用法-蒲公英云

Android------startActivityForResult的详细用法

- 日理万妓 2022-08-07 14:56 312阅读 0赞

package org.sunchao;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
public class TestStartActivityForResultActivity extends Activity implements
        OnClickListener {
    private TextView mText01;
    private TextView mText02;
    private Button button01;
    private Button button02;
    private Intent mIntent;
    private int requestCode;
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        mText01 = (TextView) findViewById(R.id.mText01);
        mText02 = (TextView) findViewById(R.id.mText02);
        button01 = (Button) findViewById(R.id.mButton01);
        button02 = (Button) findViewById(R.id.mButton02);
        button01.setOnClickListener(this);
        button02.setOnClickListener(this);
        mText01.setText("01");
        mText02.setText("02");
        mIntent = new Intent();
        mIntent.setClass(TestStartActivityForResultActivity.this,
                Activity02.class);
    }
    @Override
    public void onClick(View v) {
        switch (v.getId()) {
        case R.id.mButton01:
            // 请求码的值随便设置，但必须>=0
            requestCode = 0;
            startActivityForResult(mIntent, requestCode);
            break;
        case R.id.mButton02:
            requestCode = 2;
            startActivityForResult(mIntent, requestCode);
            break;
        default:
            break;
        }
    }
    // 回调方法，从第二个页面回来的时候会执行这个方法
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        String change01 = data.getStringExtra("change01");
        String change02 = data.getStringExtra("change02");
        // 根据上面发送过去的请求吗来区别
        switch (requestCode) {
        case 0:
            mText01.setText(change01);
            break;
        case 2:
            mText02.setText(change02);
            break;
        default:
            break;
        }
    }
}

页面二：

package org.sunchao;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
public class Activity02 extends Activity {
    private int resultCode = 0;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity02);
        Intent mIntent = new Intent();
        mIntent.putExtra("change01", "1000");
        mIntent.putExtra("change02", "2000");
        // 设置结果，并进行传送
        this.setResult(resultCode, mIntent);
        // this.finish();
    }
}