从Activity中返回数据

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主界面（等下跳转回来的界面）

public class MainActivity extends Activity{
	private Button button1;
	private EditText editText1;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main_activity);
		button1 = (Button) findViewById(R.id.button1);
		editText1 = (EditText) findViewById(R.id.editText1);
		button1.setOnClickListener(new OnClickListener() {
			
			@Override
			public void onClick(View v) {
				Intent intent = new Intent();
				intent.setClass(MainActivity.this, OneActivity.class);
				editText1.setText("123456");
				startActivityForResult(intent, 0);//注意：发送intent不能用startActivity
			}
		});
	}
	
	//返回到这个activity中会起作用的方法
	@Override
	protected void onActivityResult(int requestCode, int resultCode, Intent data) {
		super.onActivityResult(requestCode, resultCode, data);
		if (data==null) {
			return;
		}
		Log.i("是否执行", "999");
		Bundle bundle = data.getExtras();
		String num = bundle.getString("phoneNum");
		editText1.setText(num);
	}
}

跳转到的界面并带数据回到上个activity

public class OneActivity extends Activity{
	private android.widget.TextView TextView;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.one_activity);
		TextView = (android.widget.TextView) findViewById(R.id.textView1);
		TextView.setOnClickListener(new OnClickListener() {
			
			@Override
			public void onClick(View v) {
				Intent intent = new Intent();
				intent.putExtra("phoneNum", TextView.getText().toString());
				setResult(1, intent);
				Log.i("OneActivity:", TextView.getText().toString());
				finish();//关闭当前activity并返回刚才跳到这里的activity(只有使用了这个方法onActivityResult才会起作用)
			}
		});
	}
}