第一步:新建一个Android工程命名为02.Phone目录结构如下图:
第二步:修改activity_main.xml布局文件代码如下:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/please_enter_phone_number" />
<EditText
android:id="@+id/et_phone"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="phone" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="call"
android:text="@string/call" />
</LinearLayout>
strings.xml:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="app_name">02.Phone</string>
<string name="action_settings">Settings</string>
<string name="hello_world">Hello world!</string>
<string name="please_enter_phone_number">请输入电话号码</string>
<string name="call">呼叫此号码</string>
</resources>
第三步:编写MianActivity类:
package cn.leigo.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;
public class MainActivity extends Activity {
private EditText mPhoneEditText;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mPhoneEditText = (EditText) findViewById(R.id.et_phone);
}
public void call(View v) {
String number = mPhoneEditText.getText().toString();
if (!TextUtils.isEmpty(number)) {
Intent intent = new Intent(Intent.ACTION_CALL, Uri.parse("tel:"
+ number));
startActivity(intent);
}
}
}
最后在AndroidManifest.xml文件中添加权限:
<uses-permission android:name="android.permission.CALL_PHONE" />
运行工程查看效果图: