Android，按 Intent 启动相同的 Activity

Question

是否可以使用 EXTRA 单独启动位于顶部的相同 Activity ？

我创建了一个 Activity 和 2 个布局，加载每个 Activity 取决于即将到来的 EXTRA。问题是 Activity 必须像下面这样调用自己:

startActivity(new Intent(Ali.this , Ali.class).putEXTRA("which" , "2"));
this.finish();

Answer 1

Yes this is possible try below code

Button buttonOne = (Button) findViewById(R.id.button1);
buttonOne.setOnClickListener(new Button.OnClickListener() {
 public void onClick(View v) {
   Intent intent = new Intent(MainActivity.this,
                    MainActivity.class);
           intent.putExtra("data","SomeData");
            startActivity(intent);
 }
  });

In Activity onCreate add some check like below code

 @Override
protected void onCreate(Bundle bd) {
    super.onCreate(bd);
    setContentView(R.layout.filter_activity);

    bd = getIntent().getExtras();
    if (bd != null) {
        String data = bd.getString("data");
    }
}

希望对你有帮助