activity_main.xml</br>

<pre><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"
android:padding="16dp"
tools:context=".MainActivity">
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="btnTeaching"
android:text="Teaching" />
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="btnTopBar"
android:text="TopBar" />
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="btnMyTextView"
android:text="MyTextView" />
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="btnShineTextView"
android:text="ShineTextView" />
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="btnCircleProgress"
android:text="CircleProgress" />
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="btnVolumeView"
android:text="VolumeView" />
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="btnMyScrollView"
android:text="MyScrollView" />
</LinearLayout>
</pre>

MainActiviy</br>

<pre>
package com.imooc.systemwidget;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
public class MainActivity extends Activity {
private Intent mIntent;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mIntent = new Intent(this, MyViewTest.class);
}
public void btnTeaching(View view) {
mIntent.putExtra("flag", 0);
startActivity(mIntent);
}
public void btnMyTextView(View view) {
mIntent.putExtra("flag", 1);
startActivity(mIntent);
}

public void btnShineTextView(View view) {
    mIntent.putExtra("flag", 2);
    startActivity(mIntent);
}

public void btnCircleProgress(View view) {
    mIntent.putExtra("flag", 3);
    startActivity(mIntent);
}

public void btnVolumeView(View view) {
    mIntent.putExtra("flag", 4);
    startActivity(mIntent);
}

public void btnMyScrollView(View view) {
    mIntent.putExtra("flag", 5);
    startActivity(mIntent);
}

public void btnTopBar(View view) {
    startActivity(new Intent(this, TopBarTest.class));
}

}

</pre>

MyViewTest</br>

<pre>
package com.imooc.systemwidget;
import android.app.Activity;
import android.os.Bundle;
public class MyViewTest extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
int flag = getIntent().getIntExtra("flag", -1);
switch (flag) {
case 0:
setContentView(R.layout.teaching);
break;
case 1:
setContentView(R.layout.my_textview);
break;
case 2:
setContentView(R.layout.shine_textview);
break;
case 3:
setContentView(R.layout.circle_progress);
CircleProgressView circle = (CircleProgressView) findViewById(R.id.circle);
circle.setSweepValue(0);
break;
case 4:
setContentView(R.layout.volume);
break;
case 5:
setContentView(R.layout.my_scrollview);
break;
}
}
}
</pre>

1、Teaching

</br>

</br>

2、MyTextView

</br>