如何以編程方式在佈局文件的底部添加多個視圖而不會重疊

我已經成功地使用Stack Exchange和其他資源向佈局的底部添加了一個新視圖。但是，如果我嘗試以編程方式添加第二個視圖，則兩個視圖看起來重疊。如何以編程方式在佈局文件的底部添加多個視圖而不會重疊

此代碼塊成功地將新視圖添加到我的佈局文件中。

@Override 
protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 

     RelativeLayout activityMain = (RelativeLayout)findViewById(R.id.activity_main); 

     // First view 
     View playControlsPanelMinimized = new View(this); 
     RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT); 
     params.width = ViewGroup.LayoutParams.MATCH_PARENT; 
     final float scale = activityMain.getContext().getResources().getDisplayMetrics().density; 
     float dps = 10; 
     int pixels = (int) (dps * scale + 0.5f); 
     params.height = pixels; 
     playControlsPanelMinimized.setLayoutParams(params); 
     playControlsPanelMinimized.setBackgroundColor(Color.parseColor("#00FFFF")); 
     params.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM); 
     activityMain.addView(playControlsPanelMinimized);

然而，當我通過簡單地重複用新的變量的代碼添加的第二視圖，我看到存在重疊的行爲，該我只看到第一視圖的效果。

@Override 
protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 

     RelativeLayout activityMain = (RelativeLayout)findViewById(R.id.activity_main); 

     // First view 
     View playControlsPanelMinimized = new View(this); 
     RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT); 
     params.width = ViewGroup.LayoutParams.MATCH_PARENT; 
     final float scale = activityMain.getContext().getResources().getDisplayMetrics().density; 
     float dps = 10; 
     int pixels = (int) (dps * scale + 0.5f); 
     params.height = pixels; 
     playControlsPanelMinimized.setLayoutParams(params); 
     playControlsPanelMinimized.setBackgroundColor(Color.parseColor("#00FFFF")); 
     params.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM); 
     activityMain.addView(playControlsPanelMinimized); 

     // Second View 
     View playControlsPanelMinimized2 = new View(this); 
     RelativeLayout.LayoutParams params2 = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT); 
     params.width = ViewGroup.LayoutParams.MATCH_PARENT; 
     final float scale2 = activityMain.getContext().getResources().getDisplayMetrics().density; 
     float dps2 = 10; 
     int pixels2 = (int) (dps2 * scale2 + 0.5f); 
     params2.height = pixels2; 
     playControlsPanelMinimized2.setLayoutParams(params2); 
     playControlsPanelMinimized2.setBackgroundColor(Color.parseColor("#00FFFF")); 
     params2.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM); 
     activityMain.addView(playControlsPanelMinimized2);

編輯：

我改變activity_main.xml到LinearLaout，並相應地調整我的變量，但現在我再也看不到的景色。

 LinearLayout activityMain = (LinearLayout)findViewById(R.id.activity_main); 

     // First View 
     View playControlsPanelMinimized = new View(this); 
     LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT); 
     params.width = ViewGroup.LayoutParams.MATCH_PARENT; 
     final float scale = activityMain.getContext().getResources().getDisplayMetrics().density; 
     float dps = 10; 
     int pixels = (int) (dps * scale + 0.5f); 
     params.height = pixels; 
     playControlsPanelMinimized.setLayoutParams(params); 
     playControlsPanelMinimized.setBackgroundColor(Color.parseColor("#00FFFF")); 
     //params.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM); 
     activityMain.addView(playControlsPanelMinimized);

編輯

我想相對佈局方法的新技術無濟於事作爲尚未

View playControlsPanelMinimized = new LinearLayout(this); 
     RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT); 
     params.width = ViewGroup.LayoutParams.MATCH_PARENT; 
     final float scale = activityMain.getContext().getResources().getDisplayMetrics().density; 
     float dps = 10; 
     int pixels = (int) (dps * scale + 0.5f); 
     params.height = pixels; 
     playControlsPanelMinimized.setLayoutParams(params); 
     playControlsPanelMinimized.setBackgroundColor(Color.parseColor("#00FFFF")); 
     params.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM); 
     activityMain.addView(playControlsPanelMinimized); 

     View A = new View(this); 
     View B = new View(this); 
     RelativeLayout.LayoutParams params2 = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT); 
     A.setLayoutParams(params2); 
     B.setLayoutParams(params2); 

     playControlsPanelMinimized.addView(A); 
     playControlsPanelMinimized.addView(B);

來源

2015-10-06 the_prole

替換的LinearLayout你的RelativeLayout activity_main具有方向水平或垂直

來源

2015-10-06 06:23:53 Sunny

看看我的新的問題[這裏]（http://stackoverflow.com/questions/32981371/setting-view-object-parameters-height-and-width-crashes-app-with-null-referenc） –

使用lnearLayout而不是Re lative佈局，可能是你需要使用weightsum 設置方向到其他視圖的垂直/水平
看跌觀點的權利，並將其設置在XML。

來源

2015-10-06 06:59:04 AndroSco

看到我的新問題[這裏]（http://stackoverflow.com/questions/32981371/setting-view-object-parameters-height-and-width-crashes-app-with-null-referenc） –

如何以編程方式在佈局文件的底部添加多個視圖而不會重疊

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