Android的电话拨号器

1.编写布局文件

    android:layout_width="fill_parent"

    android:layout_height="fill_parent" >

    <EditText

        android:id="@+id/et_number"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:inputType="phone" >

       

   

    <Button

        android:id="@+id/bt_dail"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignParentRight="true"

        android:layout_below="@+id/et_number"

        android:text="@string/dail" />

2.编写java代码

package com.itheima.phone;

import android.app.Activity;

import android.content.In

tent;

import android.net.Uri;

import android.os.Bundle;

import android.text.TextUtils;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.EditText;

import android.widget.Toast;

public class PhoneActivity extends Activity {

private EditText dt_number = null;

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

Button bt_dail = (Button) this.findViewById(R.id.bt_dail);

dt_number = (EditText) PhoneActivity.this.findViewById(R.id.et_number);

bt_dail.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

String number = dt_number.getText().toString().trim();

if(TextUtils.isEmpty(number)) {

Toast.makeText(PhoneActivity.this, "号码不能为空！", Toast.LENGTH_SHORT).show();

return ;

}

 Intent intent = new Intent();

intent.setAction(Intent.ACTION_CALL);

intent.setData(Uri.parse("tel:" + number));

startActivity(intent);

}

});

}

}

3.清单文件授权