1-电话号拨号器
1>页面布局
<RelativeLayout 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" tools:context=".MainActivity" > <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_alignLeft="@+id/et_number" android:layout_below="@+id/et_number" android:text="@string/dail" /> </RelativeLayout>
2>MainActivity
![](https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif)
package com.dail;
import android.net.Uri;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button but = (Button)findViewById(R.id.bt_dail);
but.setOnClickListener(new myListener());
}
private class myListener implements OnClickListener
{
@Override
public void onClick(View v) {
EditText et = (EditText)findViewById(R.id.et_number);
String number = et.getText().toString();
Intent intent = new Intent();
intent.setAction(Intent.ACTION_CALL);
intent.setData(Uri.parse("tel:"+number));
startActivity(intent);
}
}
}
3>清单文件AndroidManifest.xml 添加打电话权限
<uses-permission android:name="android.permission.CALL_PHONE"/>
如果不加权限会报错
权限安全异常:
java.lang.SecurityException: Permission Denial: starting Intent { act=android.intent.action.CALL dat=tel:110 cmp=com.android.phone/.OutgoingCallBroadcaster } from ProcessRecord{43e96760 663:com.dail/10038} (pid=663, uid=10038) requires android.permission.CALL_PHONE