本以为是一个简单的电话拨号器，还是学到了不少东西，所以还是学到了不少东西，懂得了android权限  Uri.parse的几种用法：

package com.djf.phone;import android.app.Activity;import android.content.Intent;import android.net.Uri;import android.os.Bundle;import android.text.TextUtils;import android.view.View;import android.widget.EditText;import android.widget.Toast;public class MainActivity extends Activity {	@Override	protected void onCreate(Bundle savedInstanceState) {		super.onCreate(savedInstanceState);		setContentView(R.layout.activity_main);					}			public void myclick(View view) {		EditText mEditText = (EditText) findViewById(R.id.et_number);		String number = mEditText.getText().toString().trim();		boolean result = TextUtils.isEmpty(number);		if (result) {			Toast.makeText(this, "电话号码为空", 0).show();		}		else {			Intent intent = new Intent();			intent.setAction(Intent.ACTION_CALL);			intent.setData(Uri.parse("tel:"+number));			startActivity(intent);		}	}}

1，调web浏览器 
Uri myBlogUri = Uri.parse("http://xxxxx.com"); 
returnIt = new Intent(Intent.ACTION_VIEW, myBlogUri); 
2，地图 
Uri mapUri = Uri.parse("geo:38.899533,-77.036476"); 
returnIt = new Intent(Intent.ACTION_VIEW, mapUri); 
3，调拨打电话界面 
Uri telUri = Uri.parse("tel:100861"); 
returnIt = new Intent(Intent.ACTION_DIAL, telUri); 
4，直接拨打电话 
Uri callUri = Uri.parse("tel:100861"); 
returnIt = new Intent(Intent.ACTION_CALL, callUri); 
5，卸载 
Uri uninstallUri = Uri.fromParts("package", "xxx", null); 
returnIt = new Intent(Intent.ACTION_DELETE, uninstallUri); 
6，安装 
Uri installUri = Uri.fromParts("package", "xxx", null); 
returnIt = new Intent(Intent.ACTION_PACKAGE_ADDED, installUri); 
7，播放 
Uri playUri = Uri.parse("file:///sdcard/download/everything.mp3"); 
returnIt = new Intent(Intent.ACTION_VIEW, playUri); 
8，调用发邮件 
Uri emailUri = Uri.parse("mailto:xxxx@gmail.com"); 
returnIt = new Intent(Intent.ACTION_SENDTO, emailUri); 
9，发邮件 
returnIt = new Intent(Intent.ACTION_SEND); 
String[] tos = { "xxxx@gmail.com" }; 
String[] ccs = { "xxxx@gmail.com" }; 
returnIt.putExtra(Intent.EXTRA_EMAIL, tos); 
returnIt.putExtra(Intent.EXTRA_CC, ccs); 
returnIt.putExtra(Intent.EXTRA_TEXT, "body"); 
returnIt.putExtra(Intent.EXTRA_SUBJECT, "subject"); 
returnIt.setType("message/rfc882"); 
Intent.createChooser(returnIt, "Choose Email Client"); 
10，发短信 
Uri smsUri = Uri.parse("tel:100861"); 
returnIt = new Intent(Intent.ACTION_VIEW, smsUri); 
returnIt.putExtra("sms_body", "yyyy"); 
returnIt.setType("vnd.android-dir/mms-sms"); 
11，直接发邮件 
Uri smsToUri = Uri.parse("smsto://100861"); 
returnIt = new Intent(Intent.ACTION_SENDTO, smsToUri); 
returnIt.putExtra("sms_body", "yyyy"); 
12，发彩信 
Uri mmsUri = Uri.parse("content://media/external/images/media/23"); 
returnIt = new Intent(Intent.ACTION_SEND); 
returnIt.putExtra("sms_body", "yyyy"); 
returnIt.putExtra(Intent.EXTRA_STREAM, mmsUri); 
returnIt.setType("image/png");