如何在Android中创建GUI而不是使用XML？

Question

I don't like to manage XML and Java together, can I create same GUI using Java language? How can I do that, can you tell me code for simple Button ? I will appreciate the proper answer.

Answer 1

Yes, you can.

public class MyActivity extends Activity {
     protected void onCreate(Bundle icicle) {
         super.onCreate(icicle);

         final Button button = new Button(this);
         button.setText("Press me!");
         setContentView(button);

         button.setOnClickListener(new View.OnClickListener() {
             public void onClick(View v) {
                 // Perform action on click
             }
         });
     }
 }

Answer 2

Can I create same GUI using Java language?

Yes you can create GUI in Java code also as answered by @dtmilano but in general it's not a good practice for Android applications. Its easy in case of a small application but if you are going to develop an application for End User than your must have to create GUI using XML files. Its also useful when you want to develop application targeted for multiple devices with different-different display size and different-different languages.

The best practice is that try to avoid creating GUI using Java and instead use XML as much you can.

Answer 3

I found this article useful maybe It's good for you too Creating an Android User Inteface in java Code

first you need to create an object for your layout like this

RelativeLayout myLayout = new RelativeLayout(this);

then create your for example button like this

Button myButton = new Button(this);

then the Button view needs to be added as a child to the RelativeLayout view which, in turn, is displayed via a call to the setContentView() method of the activity instance

myLayout.addView(myButton);
setContentView(myLayout);

Once launched, the visible result will be a button containing no text appearing in the top left hand corner of the RelativeLayout view.

Answer 4

Definitely you can design your Android UI using java. Here is a little example for create a Button.

Follow these steps

1. import a layout package(here i've import android.widget.RelativeLayout)
2. import Button package
3. Create a layout object
4. Create a button object
5. Add button to layout
6. Set Content View

Here is the code

package com.example.vmbck.app3;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.RelativeLayout;
import android.widget.Button;


public class MainActivity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    //create layout
    RelativeLayout myLayout = new RelativeLayout(this);
    //set background color of the layout to Green
    myLayout.setBackgroundColor(Color.GREEN);

    //create button
    Button myButton = new Button(this);
    //set button's background color to red
    myButton.setBackgroundColor(Color.RED);
    //set button's text to Click Me
    myButton.setText("Click Me");

    //add button to layout
    myLayout.addView(myButton);
    //View the content
    setContentView(myLayout);
    }

}

Answer 5

如果您正在使用Eclipse，则可以从项目中转到文件夹res / layout，在那里您将找到文件main.xml右键单击此文件并选择使用/ Android布局编辑器打开在那里您将看到一个图形工具，它将生成所有这些需要包含在main.xml文件中