Task

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一实验效果图

二关键代码

JumpActivity

package com.example.jump;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 JumpActivity extends Activity{private EditText numberEt ;@Overrideprotected void onCreate(Bundle savedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.activity_jump);}public void openActivity(View v){Intent intent = new Intent(this,Second.class);startActivity(intent);this.overridePendingTransition(R.anim.enter, R.anim.out);}   private OnClickListener myListener = new Button.OnClickListener()   {       @Override       public void onClick(View v)       {       numberEt=(EditText) findViewById(R.id.numberet);                  String phone_number = numberEt.getText().toString();                       phone_number = phone_number.trim();//删除字符串首部和尾部的空格                       if(phone_number != null && !phone_number.equals(""))           {               Intent intent = new Intent(Intent.ACTION_CALL,Uri.parse("tel:"+phone_number));               JumpActivity.this.startActivity(intent);//内部类           }       }           };}

<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"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context=".JumpActivity" >    <Button        android:id="@+id/button1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignParentTop="true"        android:layout_centerHorizontal="true"        android:layout_marginTop="176dp"        android:text="@string/Button"         android:onClick="openActivity"/>    <Button        android:id="@+id/button2"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignBottom="@+id/button1"        android:layout_alignLeft="@+id/button1"        android:layout_marginBottom="72dp"        android:onClick="onClick"        android:text="@string/Button2" />    <EditText        android:id="@+id/numberet"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignParentTop="true"        android:layout_centerHorizontal="true"        android:layout_marginTop="34dp"        android:ems="10"        android:inputType="numberPassword" >        <requestFocus />    </EditText></RelativeLayout>

SecondActivity

package com.example.jump;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.view.View;public class Second extends Activity{@Overrideprotected void onCreate(Bundle savedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.activity_second);}public void openActivity(View v){Intent intent = new Intent(this,JumpActivity.class);startActivity(intent);this.overridePendingTransition(R.anim.enter,R.anim.out);}}

<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"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context=".JumpActivity" >    <Button        android:id="@+id/button1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignParentTop="true"        android:layout_centerHorizontal="true"        android:layout_marginTop="176dp"        android:text="@string/Button1"         android:onClick="openActivity"/></RelativeLayout>

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="com.example.jump"    android:versionCode="1"    android:versionName="1.0" >    <uses-permission         android:name="android.permission.CALL_PHONE" />    <uses-sdk        android:minSdkVersion="8"        android:targetSdkVersion="18" />    <application        android:allowBackup="true"        android:icon="@drawable/ic_launcher"        android:label="@string/app_name"        android:theme="@style/AppTheme" >        <activity            android:name="com.example.jump.JumpActivity"            android:label="@string/app_name" >            <intent-filter>                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.LAUNCHER" />            </intent-filter>        </activity>        <activity android:name="Second" android:label="Second"/>    </application></manifest>

enter

<?xml version="1.0" encoding="utf-8"?><set xmlns:android="http://schemas.android.com/apk/res/android"><alpha    android:fromAlpha="0"    android:toAlpha="1"    android:duration="500"/></set>

out

<?xml version="1.0" encoding="utf-8"?><set xmlns:android="http://schemas.android.com/apk/res/android"><alpha    android:fromAlpha="0"    android:toAlpha="1"    android:duration="5000"/></set>

三遇到问题

无法调用系统电话拨号器

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