安卓开发简易电话拨号器，具体内容如下

我是基于安卓4.2.2开发的，下面是我写的MainActivity.java代码：

package com.example.phone; import android.support.v7.app.ActionBarActivity; import android.support.v4.app.Fragment; import android.content.Intent; import android.net.Uri; import android.os.Bundle; import android.view.LayoutInflater; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.Button; import android.widget.EditText; public class MainActivity extends ActionBarActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); if (savedInstanceState == null) { getSupportFragmentManager().beginTransaction() .add(R.id.container, new PlaceholderFragment()).commit(); } } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.main, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { // Handle action bar item clicks here. The action bar will // automatically handle clicks on the Home/Up button, so long // as you specify a parent activity in AndroidManifest.xml. int id = item.getItemId(); if (id == R.id.action_settings) { return true; } return super.onOptionsItemSelected(item); } /** * A placeholder fragment containing a simple view. */ public static class PlaceholderFragment extends Fragment { public PlaceholderFragment() { } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View rootView = inflater.inflate(R.layout.fragment_main, container, false); final EditText numberText=(EditText) rootView.findViewById(R.id.number); Button button=(Button)rootView.findViewById(R.id.button); button.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { String number=numberText.getText().toString(); Intent intent = new Intent(Intent.ACTION_CALL,Uri.parse("tel:"+number)); startActivity(intent); // TODO Auto-generated method stub } }); return rootView; } } }

布局文件我就不贴出来了，需要注意的是项目清单文件（AndroidManifest.xml )中需要加入perimission: <uses-permission android:name="android.permission.CALL_PHONE"/>.我是安卓初学者，希望对和我一样的初学者有所帮助。

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