From ad757734d5da88630242ba2f68a06d08fc9ff479 Mon Sep 17 00:00:00 2001 From: linglongxin24 Date: Fri, 18 Nov 2016 18:15:15 +0800 Subject: [PATCH] edit README.md --- README.md | 31 ++++----------- app/src/main/AndroidManifest.xml | 3 ++ .../activitylaunchmode/MainActivity.java | 5 +++ .../singleinstance/SecondActivity.java | 35 +++++++++++++++++ .../SingleInstanceActivity.java | 36 ++++++++++++++++++ .../singleinstance/ThirdActivity.java | 34 +++++++++++++++++ app/src/main/res/layout/content_main.xml | 20 +++++++++- app/src/main/res/values-v14/styles.xml | 11 ++++++ app/src/main/res/values/strings.xml | 1 + app/src/main/res/values/styles.xml | 1 + screenshorts/demo.jpg | Bin 0 -> 134716 bytes screenshorts/device.png | Bin 0 -> 54428 bytes 12 files changed, 151 insertions(+), 26 deletions(-) create mode 100644 app/src/main/java/cn/bluemobi/dylan/activitylaunchmode/singleinstance/SecondActivity.java create mode 100644 app/src/main/java/cn/bluemobi/dylan/activitylaunchmode/singleinstance/SingleInstanceActivity.java create mode 100644 app/src/main/java/cn/bluemobi/dylan/activitylaunchmode/singleinstance/ThirdActivity.java create mode 100644 app/src/main/res/values-v14/styles.xml create mode 100644 screenshorts/demo.jpg create mode 100644 screenshorts/device.png diff --git a/README.md b/README.md index c599907..e735837 100644 --- a/README.md +++ b/README.md @@ -1,31 +1,14 @@ #深入Activity，Activity启动模式LaunchMode完全解析 #1.Standard：标准启动模式 -Activity默认模式，所有的Activity遵循元素进栈出栈的特性，例如进栈序列为A->B->C->D,D呈现在页面上，按返回键出栈顺序久违D->C->B->A. - -```flow -st=>start: Start -i=>inputoutput: 输入年份n -cond1=>condition: n能否被4整除？ -cond2=>condition: n能否被100整除？ -cond3=>condition: n能否被400整除？ -o1=>inputoutput: 输出非闰年 -o2=>inputoutput: 输出非闰年 -o3=>inputoutput: 输出闰年 -o4=>inputoutput: 输出闰年 -e=>end -st->i->cond1 -cond1(no)->o1->e -cond1(yes)->cond2 -cond2(no)->o3->e -cond2(yes)->cond3 -cond3(yes)->o2->e -cond3(no)->o4->e -``` +Activity的默认模式，所有的Activity元素遵循先进后出的进栈出栈的特性，例如进栈序列为A->B->C,CActivity展示给用户在页面上，按返回键出栈顺序为C->B->A.。这种的比较简单 #2.SingleTop:栈顶复用模式 -栈顶复用模式，如果要开启的activity在任务栈的顶部已经存在，就不会创建新的实例，而是调用 onNewIntent() 方法。避免栈顶的activity被重复的创建。 +栈顶复用模式，如果想要打开的activity在任务栈的栈顶已经存在，就不会创重新建新的实例，而是调用该Activity的 onNewIntent() 方法。避免栈顶的activity被重复的创建。 #3.SingleTask:栈内复用模式 -如果要启动的Activity在当前栈内启动，activity只会在任务栈里面存在一个实例。如果要激活的activity，在任务栈里面已经存在，就不会创建新的activity，而是复用这个已经存在的activity，调用 onNewIntent() 方法，并且清空这个activity任务栈上面所有的activity。 +如果想要启动的Activity在当前栈内启动之后，该activity只会在任务栈里面存在一个实例。如果要再次打开这个activity，在任务栈里面如果已经存在，就不会创建新的activity， +而是复用栈内的这个已经存在的activity，调用改Activity的 onNewIntent() 方法，并且清空这个activity任务栈上面所有的activity。 #4.SingleInstance：单一实例模式 -整个手机操作系统里面只有一个实例存在。不同的应用去打开这个activity 共享公用的同一个activity。他会运行在自己单独，独立的任务栈里面，并且任务栈里面只有他一个实例存在。应用场景：呼叫来电界面。这种模式的使用情况比较罕见，在Launcher中可能使用。或者你确定你需要使Activity只有一个实例。 \ No newline at end of file +在整个Android系统中(可能会有很多任务栈)里面只有一个实例存在。不同的应用程序app去启动这个activity，就会共享公用同一个activity。 +他会运行在自己单独的的任务栈里面，并且这个单独的任务栈里面只会存在着一个实例。 +应用场景：系统的发短信，打电话，来电，浏览器等。这种模式在平时很少去使用，一般在Launcher中可能会用到。 \ No newline at end of file diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml index d9a04d8..d3aa357 100644 --- a/app/src/main/AndroidManifest.xml +++ b/app/src/main/AndroidManifest.xml @@ -19,6 +19,9 @@ + + + \ No newline at end of file diff --git a/app/src/main/java/cn/bluemobi/dylan/activitylaunchmode/MainActivity.java b/app/src/main/java/cn/bluemobi/dylan/activitylaunchmode/MainActivity.java index 33397b3..56c973b 100644 --- a/app/src/main/java/cn/bluemobi/dylan/activitylaunchmode/MainActivity.java +++ b/app/src/main/java/cn/bluemobi/dylan/activitylaunchmode/MainActivity.java @@ -5,6 +5,7 @@ import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.view.View; +import cn.bluemobi.dylan.activitylaunchmode.singleinstance.SingleInstanceActivity; import cn.bluemobi.dylan.activitylaunchmode.singletask.SingleTaskActivity; import cn.bluemobi.dylan.activitylaunchmode.singletop.SingleTopActivity; @@ -24,4 +25,8 @@ public class MainActivity extends AppCompatActivity { public void onClick2(View view) { startActivity(new Intent(this, SingleTaskActivity.class)); } + + public void onClick3(View view) { + startActivity(new Intent(this, SingleInstanceActivity.class)); + } } diff --git a/app/src/main/java/cn/bluemobi/dylan/activitylaunchmode/singleinstance/SecondActivity.java b/app/src/main/java/cn/bluemobi/dylan/activitylaunchmode/singleinstance/SecondActivity.java new file mode 100644 index 0000000..4c57823 --- /dev/null +++ b/app/src/main/java/cn/bluemobi/dylan/activitylaunchmode/singleinstance/SecondActivity.java @@ -0,0 +1,35 @@ +package cn.bluemobi.dylan.activitylaunchmode.singleinstance; + +import android.content.Intent; +import android.os.Bundle; +import android.support.annotation.Nullable; +import android.support.v7.app.AppCompatActivity; +import android.view.Gravity; +import android.view.View; +import android.view.ViewGroup; +import android.widget.Button; + +import cn.bluemobi.dylan.activitylaunchmode.singletask.LoginActivity; +import cn.bluemobi.dylan.activitylaunchmode.singletask.RegisterActivity; + +/** + * Created by yuandl on 2016-11-18. + */ + +public class SecondActivity extends AppCompatActivity { + @Override + protected void onCreate(@Nullable Bundle savedInstanceState) { + super.onCreate(savedInstanceState); + Button button = new Button(this); + button.setGravity(Gravity.CENTER); + button.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT)); + button.setText("这是二个界面，SingleInstance的启动模式，点击跳转到第三个Activity（标准的启动模式）"); + setContentView(button); + button.setOnClickListener(new View.OnClickListener() { + @Override + public void onClick(View view) { + startActivity(new Intent(SecondActivity.this, ThirdActivity.class)); + } + }); + } +} diff --git a/app/src/main/java/cn/bluemobi/dylan/activitylaunchmode/singleinstance/SingleInstanceActivity.java b/app/src/main/java/cn/bluemobi/dylan/activitylaunchmode/singleinstance/SingleInstanceActivity.java new file mode 100644 index 0000000..c959411 --- /dev/null +++ b/app/src/main/java/cn/bluemobi/dylan/activitylaunchmode/singleinstance/SingleInstanceActivity.java @@ -0,0 +1,36 @@ +package cn.bluemobi.dylan.activitylaunchmode.singleinstance; + +import android.content.Intent; +import android.os.Bundle; +import android.support.annotation.Nullable; +import android.support.v7.app.AppCompatActivity; +import android.view.Gravity; +import android.view.View; +import android.view.ViewGroup; +import android.widget.Button; +import android.widget.TextView; + +import cn.bluemobi.dylan.activitylaunchmode.singletask.LoginActivity; +import cn.bluemobi.dylan.activitylaunchmode.singletask.RegisterActivity; + +/** + * Created by yuandl on 2016-11-18. + */ + +public class SingleInstanceActivity extends AppCompatActivity { + @Override + protected void onCreate(@Nullable Bundle savedInstanceState) { + super.onCreate(savedInstanceState); + Button button = new Button(this); + button.setGravity(Gravity.CENTER); + button.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT)); + button.setText("这是第一界面，标准的启动模式,点击跳转到SecondActivity（SecondActivity启动模式是SingleInstance）"); + setContentView(button); + button.setOnClickListener(new View.OnClickListener() { + @Override + public void onClick(View view) { + startActivity(new Intent(SingleInstanceActivity.this, SecondActivity.class)); + } + }); + } +} diff --git a/app/src/main/java/cn/bluemobi/dylan/activitylaunchmode/singleinstance/ThirdActivity.java b/app/src/main/java/cn/bluemobi/dylan/activitylaunchmode/singleinstance/ThirdActivity.java new file mode 100644 index 0000000..9da04b0 --- /dev/null +++ b/app/src/main/java/cn/bluemobi/dylan/activitylaunchmode/singleinstance/ThirdActivity.java @@ -0,0 +1,34 @@ +package cn.bluemobi.dylan.activitylaunchmode.singleinstance; + +import android.content.Intent; +import android.os.Bundle; +import android.support.annotation.Nullable; +import android.support.v7.app.AppCompatActivity; +import android.view.Gravity; +import android.view.View; +import android.view.ViewGroup; +import android.widget.Button; + +import cn.bluemobi.dylan.activitylaunchmode.singletask.RegisterActivity; + +/** + * Created by yuandl on 2016-11-18. + */ + +public class ThirdActivity extends AppCompatActivity { + @Override + protected void onCreate(@Nullable Bundle savedInstanceState) { + super.onCreate(savedInstanceState); + Button button = new Button(this); + button.setGravity(Gravity.CENTER); + button.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT)); + button.setText("这是三个界面，标准的启动模式，点击回退"); + setContentView(button); + button.setOnClickListener(new View.OnClickListener() { + @Override + public void onClick(View view) { + finish(); + } + }); + } +} diff --git a/app/src/main/res/layout/content_main.xml b/app/src/main/res/layout/content_main.xml index 2407dbc..fc37e91 100644 --- a/app/src/main/res/layout/content_main.xml +++ b/app/src/main/res/layout/content_main.xml @@ -19,7 +19,8 @@ android:layout_marginStart="27dp" android:layout_marginTop="64dp" android:onClick="onClick" - android:text="@string/singleTop" /> + android:text="@string/singleTop" + android:textAllCaps="false" />