通过Intent启动Activity、获取Activity返回值

浅浅的花香味﹌ 2024-02-18 16:12 50阅读 0赞

父Activity:MainActivity.java

package com.example.test61;
    
    import android.app.Activity;
    import android.content.Intent;
    import android.net.Uri;
    import android.os.Bundle;
    import android.view.Menu;
    import android.view.MenuItem;
    import android.view.View;
    import android.view.View.OnClickListener;
    import android.widget.Button;
    import android.widget.TextView;
    
    public class MainActivity extends Activity {
        Button button,button2;
        TextView textView;
        private final int SUBACTIVITY1 = 1 , SUBACTIVITY2 = 2; //requestCode请求码
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            button = (Button)findViewById(R.id.btn);
            button.setOnClickListener(new OnClickListener() {
    			
    			@Override
    			public void onClick(View arg0) {
    				Intent intent = new Intent(MainActivity.this, NewActivity.class);
    				//startActivity(intent);
    				startActivityForResult(intent, SUBACTIVITY1);  //启动子Activity
    			}
    		});
    
            
            button2 = (Button)findViewById(R.id.btn2);
            button2.setOnClickListener(new OnClickListener() {
    			
    			@Override
    			public void onClick(View arg0) {
    				Intent intent = new Intent(Intent.ACTION_VIEW,Uri.parse("http://www.baidu.com"));
    				//startActivity(intent);
    				startActivityForResult(intent, SUBACTIVITY2);   
    			}
    		});
        }
        
      //重载方法，接受返回值
    	@Override
    	protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    		super.onActivityResult(requestCode, resultCode, data);
    		switch (requestCode) {
    		case SUBACTIVITY1:  
    			if(resultCode==Activity.RESULT_OK){
                    Uri uriData = data.getData();
                    textView = (TextView)findViewById(R.id.tv);
                    textView.setText(uriData.toString());
    			}else if(requestCode==Activity.RESULT_CANCELED){}
    			break;
    
    		case SUBACTIVITY2:
    			if(resultCode==Activity.RESULT_OK){
    				Uri uriData = data.getData();
    			}
    			break;
    		default:
    			break;
    		}
    	}
        
        
        
    }

xml布局：

子Activity:NewActivity.java

xml布局：

另外一个子Activity类似，这里不再累赘。

![Center][]

点击启动Activity:

![Center 1][]

点击接受：

![Center 2][] 这里接受到返回值并输入

[Center]: https://image.dandelioncloud.cn/pgy_files/images/2024/01/29/b2242dc2fc664240b8ab1a1bbceda2f4.png
[Center 1]: https://image.dandelioncloud.cn/pgy_files/images/2024/01/29/c61ccdb3c5c54493b2e0a764a31e7b64.png
[Center 2]: https://image.dandelioncloud.cn/pgy_files/images/2024/01/29/96b89316491d4513b3ea78fb2ab9f7db.png