Android如何显示文本

我是android新手。我有一些代码。我有

Simple.java：

 public class Simple extends Activity {
     /** Called when the activity is first created. */
      Button show;
      TextView view;
    EditText edit;

 @Override
  public void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.main);
       show=(Button)findViewById(R.id.show);
      view=(TextView)findViewById(R.id.view);
      edit=(EditText)findViewById(R.id.edit);


show.setOnClickListener(new OnClickListener(){
    public void onClick(View view){

    show();

    }
});

}

public void show(){
    String text=edit.getText().toString();
    view.setText(text);
    Intent t=new Intent(this,Show.class);
    startActivity(t);

}

}

当我试图在同一活动中显示文本时，它起作用了。。。 我正在尝试传递我在EditText中键入的文本，并将其显示到Show.class

Show.class的代码

公听会扩大活动范围{

private Simple simple;
TextView text1;
Button back;
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.next);
    back=(Button)findViewById(R.id.button);
    text1=(TextView)findViewById(R.id.then);

    back.setOnClickListener(new OnClickListener(){
        public void onClick(View view){
            start();
        }
    });
}
public void start(){
        String t=simple.edit.getText().toString();
        text1.setText(t);

    Intent t=new Intent(this,Simple.class);
    startActivity(t);
}

}

我尝试了这个，但我无法在Simple.java中显示我在editText中提供的文本。 我知道这是基本的，但我知道。因此，请帮助我。提前感谢。

尝试将此添加到show（）：

然后在Show类的start（）方法中，使用：

Intent t = getIntent();
Bundle data = t.getExtras();
text1.setText(data.getString("editText"));

我还没有对此进行测试（并且对您的实现有点困惑…），但是putExtra和getExtra函数是您可能希望使用的

public class Intents extends Activity {
    /** Called when the activity is first created. */

    EditText edit;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        Button button = (Button) findViewById(R.id.start);
        button.setOnClickListener(mStartListener);
        Button button1 = (Button) findViewById(R.id.start1);
        button1.setOnClickListener(activity2);
        edit=(EditText)findViewById(R.id.edit);
        Button show=(Button)findViewById(R.id.show);
        show.setOnClickListener(activity3);

    }
    private OnClickListener mStartListener = new OnClickListener() {
        public void onClick(View v) {
            startActivity(new Intent(Intents.this, 
                    startactivity1.class));

        }
    };
    private OnClickListener activity2 = new OnClickListener() {
        public void onClick(View v) {
            startActivity(new Intent(Intents.this, 
                    startactivity2.class));        
        }
    };

    private OnClickListener activity3 = new OnClickListener() {
        public void onClick(View v) {
            String text=edit.getText().toString();
            Intent t = new Intent(Intents.this, startactivity3.class);
            t.putExtra("editText", text);
            startActivity(t);

            //startActivity(new Intent(Intents.this, 
                  //  startactivity3.class));        
        }
    };
}





public class startactivity3 extends Activity {
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.actv3);
     //   Button ok = (Button)findViewById(R.id.but);
        TextView text1=(TextView)findViewById(R.id.vi);
        Intent t = getIntent();
        Bundle data = t.getExtras();
        text1.setText(data.getString("editText"));

    }   

}

别忘了在android清单文件中添加新活动。转到您当前的应用程序文件单击应用程序并在我的案例中添加新活动我将添加showactivity3在您的案例中，您必须在清单中显示活动。请尝试此代码，并对其进行测试

public class Intents extends Activity {
    /** Called when the activity is first created. */

    EditText edit;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        Button button = (Button) findViewById(R.id.start);
        button.setOnClickListener(mStartListener);
        Button button1 = (Button) findViewById(R.id.start1);
        button1.setOnClickListener(activity2);
        edit=(EditText)findViewById(R.id.edit);
        Button show=(Button)findViewById(R.id.show);
        show.setOnClickListener(activity3);

    }
    private OnClickListener mStartListener = new OnClickListener() {
        public void onClick(View v) {
            startActivity(new Intent(Intents.this, 
                    startactivity1.class));

        }
    };
    private OnClickListener activity2 = new OnClickListener() {
        public void onClick(View v) {
            startActivity(new Intent(Intents.this, 
                    startactivity2.class));        
        }
    };

    private OnClickListener activity3 = new OnClickListener() {
        public void onClick(View v) {
            String text=edit.getText().toString();
            Intent t = new Intent(Intents.this, startactivity3.class);
            t.putExtra("editText", text);
            startActivity(t);

            //startActivity(new Intent(Intents.this, 
                  //  startactivity3.class));        
        }
    };
}





public class startactivity3 extends Activity {
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.actv3);
     //   Button ok = (Button)findViewById(R.id.but);
        TextView text1=(TextView)findViewById(R.id.vi);
        Intent t = getIntent();
        Bundle data = t.getExtras();
        text1.setText(data.getString("editText"));

    }   

}