android 瀏覽器原理原碼

實現一個簡單的瀏覽器功能：

：

 

 

你看，可以上網羅。。。

控制碼：

package org.example.browserintent;

import org.example.browserintent.R;

import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnKeyListener;
import android.widget.Button;
import android.widget.EditText;

public class BrowserIntent extends Activity {
 private EditText urlText;
 private Button goButton;

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

  // Get a handle to all user interface elements
  urlText = (EditText) findViewById(R.id.url_field);
  goButton = (Button) findViewById(R.id.go_button);

  // Setup event handlers
  goButton.setOnClickListener(new OnClickListener() {
   public void onClick(View view) {
    openBrowser();
   }
  });
  urlText.setOnKeyListener(new OnKeyListener() {
   public boolean onKey(View view, int keyCode, KeyEvent event) {
    if (keyCode == KeyEvent.KEYCODE_ENTER) {
     openBrowser();
     return true;
    }
    return false;
   }
  });
 }

 private void openBrowser() {
  Uri uri = Uri.parse(urlText.getText().toString());
  Intent intent = new Intent(Intent.ACTION_VIEW, uri);
  startActivity(intent);
 }
}