Question

如何在另一个Activity中使用Integers和Strings？

由于

Answer 1

直接在intent

中设置值会容易得多

Intent支持 putExtra（名称，值）;

        Intent intent = new Intent(Search.this, SearchResults.class);  
        EditText txt1 = (EditText) findViewById(R.id.edittext);
        EditText txt2 = (EditText) findViewById(R.id.edittext2);

        intent.putExtra("name", txt1.getText().toString());
        intent.putExtra("state", Integer.parseInt(txt2.getText().toString()));  

        startActivity(intent);  

....

      getIntent().getStringExtra("name"); 
      getIntent().getIntExtra("state", 0); // default

http://developer.android.com/reference/android/content/Intent.html#putExtra%28java.lang.String,%20android.os.Bundle%29

Answer 2

在活动1中：

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.search);

    Button search = (Button) findViewById(R.id.btnSearch);
    search.setOnClickListener(new View.OnClickListener() {
        public void onClick(View view) {

            Intent intent = new Intent(Search.this, SearchResults.class);  
            Bundle b = new Bundle(); 

            EditText txt1 = (EditText) findViewById(R.id.edittext);
            EditText txt2 = (EditText) findViewById(R.id.edittext2);

            b.putString("name", txt1.getText().toString());
            b.putInt("state", Integer.parseInt(txt2.getText().toString()));  

            //Add the set of extended data to the intent and start it
            intent.putExtras(b);
            startActivity(intent);  
        }

    });
}

在接收活动中：

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.search_results);

    Bundle b = getIntent().getExtras(); 
    int value = b.getInt("state", 0);
    String name = b.getString("name");

    TextView vw1 = (TextView) findViewById(R.id.txtName);
    TextView vw2 = (TextView) findViewById(R.id.txtState);

    vw1.setText("Name: " + name);
    vw2.setText("State: " + String.valueOf(value));
}

但是下一次在发布这样一个基本问题之前搜索SO。那里有很多类似的问题。

通过Android中的活动传递整数和字符串？

2 个答案: