Question

我需要通过get intent从两个活动中获取数据但不起作用。

这个activiy1：

＆＃13;

 listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long viewId) {

                TextView idTextView = (TextView) view.findViewById(R.id.id);
                TextView titleTextView = (TextView) view.findViewById(R.id.title);
                TextView descTextView = (TextView) view.findViewById(R.id.desc);

                String id = idTextView.getText().toString();
                String title = titleTextView.getText().toString();
                String desc = descTextView.getText().toString();

                Intent modify_intent = new Intent(getApplicationContext(), ShowDat.class);
                modify_intent.putExtra("title1", title);
                modify_intent.putExtra("desc1", desc);
                modify_intent.putExtra("id1", id);

                startActivity(modify_intent);
            }
        });

＆＃13;

和此活动2：

＆＃13;

listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long viewId) {

                TextView idTextView = (TextView) view.findViewById(R.id.id);
                TextView titleTextView = (TextView) view.findViewById(R.id.title);
                TextView descTextView = (TextView) view.findViewById(R.id.desc);

                String id = idTextView.getText().toString();
                String title = titleTextView.getText().toString();
                String desc = descTextView.getText().toString();

                Intent modify_intent = new Intent(getApplicationContext(), ShowDat.class);
                modify_intent.putExtra("title2", title);
                modify_intent.putExtra("desc2", desc);
                modify_intent.putExtra("id2", id);

                startActivity(modify_intent);
            }
        });

＆＃13;

此活动比接收数据：

＆＃13;

        TextView idTextView = (TextView) findViewById(R.id.id);
        TextView titleTextView = (TextView) findViewById(R.id.title);
        TextView descTextView = (TextView) findViewById(R.id.desc);

        Intent intent = getIntent();
        if(intent != null) {
            intent = getIntent();
            String id = intent.getStringExtra("id1");
            String name = intent.getStringExtra("title1");
            String desc = intent.getStringExtra("desc1");

            try {
                _id = Long.parseLong(id);
            } catch (NumberFormatException e) {
                _id = 0; // your default value
            }

            idTextView.setText(id);
            titleTextView.setText(name);
            descTextView.setText(desc);
        }
        else {

            intent = getIntent();
            String id = intent.getStringExtra("id2");
            String name = intent.getStringExtra("title2");
            String desc = intent.getStringExtra("desc2");

            try {
                _id = Long.parseLong(id);
            } catch (NumberFormatException e) {
                _id = 0; // your default value
            }

            idTextView.setText(id);
            titleTextView.setText(name);
            descTextView.setText(desc);
        }

＆＃13;

我尝试使用此代码，但是就像上面的代码一样，只是放了额外的接收而其他不能正常工作：

＆＃13;

        TextView idTextView = (TextView) findViewById(R.id.id);
        TextView titleTextView = (TextView) findViewById(R.id.title);
        TextView descTextView = (TextView) findViewById(R.id.desc);

      Intent intent = getIntent();
      if(getIntent() !=null) {
                    
            String id = intent.getStringExtra("id1");
            String name = intent.getStringExtra("title1");
            String desc = intent.getStringExtra("desc1");

            try {
                _id = Long.parseLong(id);
            } catch (NumberFormatException e) {
                _id = 0; // your default value
            }

            idTextView.setText(id);
            titleTextView.setText(name);
            descTextView.setText(desc);
        }
        else {
            String id = intent.getStringExtra("id2");
            String name = intent.getStringExtra("title2");
            String desc = intent.getStringExtra("desc2");

            try {
                _id = Long.parseLong(id);
            } catch (NumberFormatException e) {
                _id = 0; // your default value
            }

            idTextView.setText(id);
            titleTextView.setText(name);
            descTextView.setText(desc);
        }

＆＃13;

请帮忙。

Answer 1

首先你需要像这样检查

    if(getIntent().hasExtra("key_1"))
    {
       String data = getIntent().getString("key_1");
    }
    else if(getIntent().hasExtra("key_2"))
    {
       String msg = getIntent().getString("key_2");
    }
    ......

Answer 2

你可以用两种方式做到这一点。

1）if(getIntent().hasExtra("your_key")）和

2）在两个活动中使用相同的密钥来传递数据

喜欢modify_intent.putExtra("same_key", title);

如何在活动中使用两个getIntent？

2 个答案: