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

- 日理万妓 2022-08-07 14:56 187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();
    	}
    
    }