Intent
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src 中的 MainActivity:
public class MainActivity extends Activity implements View.OnClickListener {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);findViewById(R.id.btn_start_second_by_action).setOnClickListener(this);findViewById(R.id.btn_call).setOnClickListener(this);findViewById(R.id.btn_dial).setOnClickListener(this);findViewById(R.id.btn_start_second).setOnClickListener(this);}@Overridepublic void onClick(View v) {switch (v.getId()) {case R.id.btn_start_second:// 激活Activity,最简单的语法Intent intent = new Intent(MainActivity.this, SecondActivity.class);intent.putExtra("name", "Mike");intent.putExtra("age", 10);startActivity(intent);break;case R.id.btn_dial:Intent it = new Intent();it.setAction("android.intent.action.DIAL");it.setData(Uri.parse("tel:10086"));startActivity(it);break;case R.id.btn_call:Intent it2 = new Intent();it2.setAction(Intent.ACTION_CALL);it2.setData(Uri.parse("tel:10086"));startActivity(it2);break;case R.id.btn_start_second_by_action:Intent it3 = new Intent();it3.setAction("number_two");startActivity(it3);break;}}}
src 中的 SecondActivity:
public class SecondActivity extends Activity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_second);Intent intent = getIntent();String n = intent.getStringExtra("name");int a = intent.getIntExtra("age", 5454689);Log.d("", "n=" + n + ", a=" + a);Toast.makeText(this, "n=" + n + ", a=" + a, Toast.LENGTH_LONG).show();}}新建一个 android.os 的包
CustomBundle:
public class CustomBundle {private HashMap<String, Object> map = new HashMap<String, Object>();public void put(String key, int value) {map.put(key, value);}public int getInt(String key) {return Integer.valueOf(map.get(key).toString());}public long getLong(String key) {return Long.valueOf(map.get(key).toString());}public void put(String key, long value) {map.put(key, value);}public void put(String key, String value) {map.put(key, value);}}res 中的 activity_main.xml :
<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=".MainActivity" > <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerHorizontal="true" android:layout_centerVertical="true" android:text="1" android:textSize="50sp" /> <Button android:id="@+id/btn_start_second" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_centerHorizontal="true" android:text="激活第2个Activity" /> <Button android:id="@+id/btn_dial" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_above="@+id/btn_start_second" android:layout_centerHorizontal="true" android:text="拨打10086" /> <Button android:id="@+id/btn_call" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_above="@+id/btn_dial" android:layout_centerHorizontal="true" android:text="呼叫10086" /> <Button android:id="@+id/btn_start_second_by_action" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_above="@+id/btn_call" android:layout_centerHorizontal="true" android:text="隐式激活SecondActivity" /></RelativeLayout>res 中的 activity_second.xml:
<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=".SecondActivity" > <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerHorizontal="true" android:layout_centerVertical="true" android:text="2" android:textSize="50sp" /></RelativeLayout>文件清单:
<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android" package="cn.tedu.intent" android:versionCode="1" android:versionName="1.0" > <uses-permission android:name="android.permission.C"/> <uses-sdk android:minSdkVersion="8" android:targetSdkVersion="17" /> <application android:allowBackup="true" android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" > <activity android:name="cn.tedu.intent.MainActivity" 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="cn.tedu.intent.SecondActivity" android:label="@string/title_activity_second" > <intent-filter> <category android:name="android.intent.category.DEFAULT"/> <action android:name="second" /> <action android:name="number2" /> <action android:name="number_two" /> <category android:name="category_second"/> <category android:name="category_number2"/> <category android:name="category_number_two"/> </intent-filter> </activity> </application></manifest>
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