我正在尝试创建RelativeLayout 容器框以在其中包含元素并以编程方式将它们创建到RelativeLayout 中。代码在没有将元素放在 RelativeLayout 容器中的情况下运行良好，但是当我将它们放入时会使应用程序崩溃。
这是代码，有人可以帮我弄清楚我做错了什么，需要做些什么来解决这个问题：
layout = new RelativeLayout(this);
RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT, RelativeLayout.LayoutParams.MATCH_PARENT);
RelativeLayout.LayoutParams textParams1 = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
RelativeLayout.LayoutParams textParams2 = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
RelativeLayout.LayoutParams textParams3 = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
RelativeLayout.LayoutParams textParams4 = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
RelativeLayout.LayoutParams progressParams1 = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
RelativeLayout.LayoutParams imageButtonParams1 = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
RelativeLayout.LayoutParams containerParams1 = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, dpContainerHeight);
RelativeLayout.LayoutParams containerParams2 = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, dpContainerHeight);
layout.setPadding(dpMargin, dpMargin, dpMargin, dpMargin);
tv1 = new TextView(this);
textParams1.addRule(RelativeLayout.ALIGN_PARENT_TOP);
textParams1.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
tv1.setId(1);
tv1.setText("TextView1");
tv2 = new TextView(this);
textParams2.addRule(RelativeLayout.ALIGN_PARENT_LEFT);
textParams2.addRule(RelativeLayout.BELOW, tv1.getId());
textParams2.setMargins(0, 0, 0, dpMargin);
tv2.setId(2);
tv2.setText("TextView2");
containerLayout1 = new RelativeLayout(this);
containerParams1.addRule(RelativeLayout.ALIGN_LEFT, tv2.getId());
containerParams1.addRule(RelativeLayout.ALIGN_RIGHT, tv1.getId());
containerParams1.addRule(RelativeLayout.BELOW, tv2.getId());
containerParams1.setMargins(0, 0, 0, dpMargin);
containerLayout1.setId(3);
containerLayout1.setBackgroundResource(R.color.display_panels);
containerLayout2 = new RelativeLayout(this);
containerParams2.addRule(RelativeLayout.ALIGN_LEFT, containerLayout1.getId());
containerParams2.addRule(RelativeLayout.ALIGN_RIGHT, containerLayout1.getId());
containerParams2.addRule(RelativeLayout.BELOW, containerLayout1.getId());
containerParams2.setMargins(0, 0, 0, dpMargin);
containerLayout2.setId(4);
containerLayout2.setBackgroundResource(R.color.display_panels);
tv3 = new TextView(this);
textParams3.addRule(RelativeLayout.ABOVE, tv4.getId());
textParams3.addRule(RelativeLayout.ALIGN_LEFT, pb1.getId());
tv3.setId(5);
tv3.setText("TextView3");
tv3.setTextAppearance(this, android.R.attr.textAppearanceSmall);
tv4 = new TextView(this);
textParams4.addRule(RelativeLayout.ABOVE, pb1.getId());
textParams4.addRule(RelativeLayout.CENTER_HORIZONTAL);
tv4.setId(6);
tv4.setText("TextView4");
tv4.setTextAppearance(this, android.R.attr.textAppearanceSmall);
pb1 = new ProgressBar(this);
progressParams1.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
progressParams1.addRule(RelativeLayout.ALIGN_PARENT_LEFT);
progressParams1.addRule(RelativeLayout.LEFT_OF, ib1.getId());
pb1.setId(7);
pb1.setProgress(40);
pb1.setMax(100);
ib1 = new ImageButton(this);
imageButtonParams1.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
imageButtonParams1.addRule(RelativeLayout.ALIGN_TOP, pb1.getId());
ib1.setId(8);
ib1.setBackgroundResource(R.color.display_panels);
ib1.setImageResource(R.drawable.ic_green_ok);
layout.addView(tv1, textParams1);
layout.addView(tv2, textParams2);
containerLayout1.addView(tv3, textParams3);
containerLayout1.addView(tv4, textParams4);
containerLayout1.addView(pb1, progressParams1);
containerLayout1.addView(ib1, imageButtonParams1);
layout.addView(containerLayout1, containerParams1);
layout.addView(containerLayout2, containerParams2);
setContentView(layout, layoutParams);
这是日志猫：
07-08 11:44:31.926: E/AndroidRuntime(7533): FATAL EXCEPTION: main
07-08 11:44:31.926: E/AndroidRuntime(7533): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.mobileapplicationretry/com.example.mobileapplicationretry.TestContainerActivity}: java.lang.NullPointerException
07-08 11:44:31.926: E/AndroidRuntime(7533): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180)
07-08 11:44:31.926: E/AndroidRuntime(7533): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
07-08 11:44:31.926: E/AndroidRuntime(7533): at android.app.ActivityThread.access$600(ActivityThread.java:141)
07-08 11:44:31.926: E/AndroidRuntime(7533): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
07-08 11:44:31.926: E/AndroidRuntime(7533): at android.os.Handler.dispatchMessage(Handler.java:99)
07-08 11:44:31.926: E/AndroidRuntime(7533): at android.os.Looper.loop(Looper.java:137)
07-08 11:44:31.926: E/AndroidRuntime(7533): at android.app.ActivityThread.main(ActivityThread.java:5041)
07-08 11:44:31.926: E/AndroidRuntime(7533): at java.lang.reflect.Method.invokeNative(Native Method)
07-08 11:44:31.926: E/AndroidRuntime(7533): at java.lang.reflect.Method.invoke(Method.java:511)
07-08 11:44:31.926: E/AndroidRuntime(7533): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
07-08 11:44:31.926: E/AndroidRuntime(7533): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
07-08 11:44:31.926: E/AndroidRuntime(7533): at dalvik.system.NativeStart.main(Native Method)
07-08 11:44:31.926: E/AndroidRuntime(7533): Caused by: java.lang.NullPointerException
07-08 11:44:31.926: E/AndroidRuntime(7533): at com.example.mobileapplicationretry.TestContainerActivity.onCreate(TestContainerActivity.java:72)
07-08 11:44:31.926: E/AndroidRuntime(7533): at android.app.Activity.performCreate(Activity.java:5104)
07-08 11:44:31.926: E/AndroidRuntime(7533): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
07-08 11:44:31.926: E/AndroidRuntime(7533): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
07-08 11:44:31.926: E/AndroidRuntime(7533): ... 11 more