Android studio list of useful shortcuts or like Eclipse
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File -> Settings -> Keymap you can do select Eclipse keymap from drop down menu
Ctrl+Shift+A (Help | Find Action on the main menu) and start typing the name of the action. Choose the desired action from the suggestion list.
Ctrl+Click (on Windows) or Cmd+Click (on MacOS) a tab in the editor to navigate to any part of the file path. Select the necessary element in the drop-down, and the corresponding file path opens in an external browser (e.g., in the Explorer, if your OS is Windows).
Ctrl+F find
Refactor | Rename: Shift+F6 ( +F6)
Find and replace: CTRL + R
Go to variable declaration: CTRL + B
Ctrl+Shift+I (View | Quick Definition)
Ctrl+Alt+F7 (Edit | Find | Show Usages in the main menu)
Ctrl+Shift+F find in project
Ctrl+Shift+F7 (Edit | Find | Highlight Usages in File) to quickly highlight usages of some variable in the current file.
Use F3 and Shift+F3 keys to navigate through highlighted usages.
Press Escape to remove highlighting.
Ctrl+W (extend selection) in the editor selects the word at the caret and then selects expanding areas of the source code. For example, it may select a method name, then the expression that calls this method, then the whole statement, then the containing block, etc. You can also select the word at the caret and the expanding areas of the source code by double-clicking the target areas in the editor.
To search through the classes, files, tool windows, actions, settings, and symbols of your project by double pressing the Shift key
Ctrl+P (View | Parameter Info) e.g. localURL = new URL(localUrlString); select localUrlString and press Ctrl + P
Show html documentation tooltips: CTRL + Q
Comment uncomment single line: CTRL + /
Comment uncomment selected text: CTRL + SHIFT + /
Code completion (Ctrl+Space)
Alt key and mouse pointer dragging for column selection
If nothing is selected in the editor, and you press Ctrl+C, then the whole line at caret is copied to the clipboard.
Ctrl + Delete delete word from caret to end.
Ctrl + Backspace delete word from caret to start.
Duplicate line: CTRL + D
To compare two directories,or jar files, select one or both of them in the Project view and press Ctrl+D.
Editor Delete Line: CTRL + Y
Move line UP, DOWN. Select a code fragment and press Ctrl+Shift+Up or Ctrl+Shift+Down.
To open any class or file in the editor at the desired line, press Ctrl+Shift+N (Navigate | File), start typing the name, and choose the one from the suggestion list. Then type the colon (:) and a line number
Ctrl+Shift+Enter to complete a current statement such as if, do-while, try-catch, return (or a method call)
Alt+Enter to invoke a quick fix or intention action, press the right arrow key to reveal the list of additional options.
To quickly review your recent changes to the project: Alt+Shift+C
Code Completion, you can accept the currently highlighted selection in the popup list with the period character (.), comma (,), semicolon (;), space and other characters.
Quickly move between methods in the editor: Alt+Up and Alt+Down
Ctrl+Shift+J shortcut joins two lines into one and removes unnecessary space to match your code style
Ctrl+Shift+V to choose and insert recent clipboard contents into the text
Inheritance hierarchy for a selected class: Ctrl+H
Right-clicking on a breakpoint marker you can quickly enable/disable the breakpoint or adjust its properties.
Evaluate the value of any expression while debugging the program, select its text in the editor (you may press a Ctrl+W a few times to efficiently perform this operation) and press Alt+F8.
Quickly evaluate the value of any expression while debugging the program, hold Alt and click this expression to see its value and calculate it, call a method, etc.
You can use the Extract Variable refactoring even on incomplete statements. Just select the necessary block in the editor and press Ctrl+Alt+V.
To open any particular method or field in editor: Ctrl+Alt+Shift+N
Add unimplemented methods: CTRL + I
Override methods: CTRL + O
Format code: CTRL + ALT + L
Show project: ALT + 1
Show logcat: ALT + 6
Hide project - logcat: SHIFT + ESC
Build: CTRL + F9
Build and Run: CTRL + F10
Alt+Shift+F10 access the Run/Debug dropdown on the main toolbar
Collapse all: CTRL + SHIFT + NumPad +
Expand all: CTRL + SHIFT + NumPad -
Ctrl+Shift+A (Help | Find Action on the main menu) and start typing the name of the action. Choose the desired action from the suggestion list.
Ctrl+Click (on Windows) or Cmd+Click (on MacOS) a tab in the editor to navigate to any part of the file path. Select the necessary element in the drop-down, and the corresponding file path opens in an external browser (e.g., in the Explorer, if your OS is Windows).
Find - Rename
Ctrl+F find
Refactor | Rename: Shift+F6 ( +F6)
Find and replace: CTRL + R
Go to variable declaration: CTRL + B
Ctrl+Shift+I (View | Quick Definition)
Ctrl+Alt+F7 (Edit | Find | Show Usages in the main menu)
Ctrl+Shift+F find in project
Ctrl+Shift+F7 (Edit | Find | Highlight Usages in File) to quickly highlight usages of some variable in the current file.
Use F3 and Shift+F3 keys to navigate through highlighted usages.
Press Escape to remove highlighting.
Ctrl+W (extend selection) in the editor selects the word at the caret and then selects expanding areas of the source code. For example, it may select a method name, then the expression that calls this method, then the whole statement, then the containing block, etc. You can also select the word at the caret and the expanding areas of the source code by double-clicking the target areas in the editor.
To search through the classes, files, tool windows, actions, settings, and symbols of your project by double pressing the Shift key
Ctrl+P (View | Parameter Info) e.g. localURL = new URL(localUrlString); select localUrlString and press Ctrl + P
Show html documentation tooltips: CTRL + Q
Edit
Comment uncomment single line: CTRL + /
Comment uncomment selected text: CTRL + SHIFT + /
Code completion (Ctrl+Space)
Alt key and mouse pointer dragging for column selection
If nothing is selected in the editor, and you press Ctrl+C, then the whole line at caret is copied to the clipboard.
Ctrl + Delete delete word from caret to end.
Ctrl + Backspace delete word from caret to start.
Duplicate line: CTRL + D
To compare two directories,or jar files, select one or both of them in the Project view and press Ctrl+D.
Editor Delete Line: CTRL + Y
Move line UP, DOWN. Select a code fragment and press Ctrl+Shift+Up or Ctrl+Shift+Down.
To open any class or file in the editor at the desired line, press Ctrl+Shift+N (Navigate | File), start typing the name, and choose the one from the suggestion list. Then type the colon (:) and a line number
Ctrl+Shift+Enter to complete a current statement such as if, do-while, try-catch, return (or a method call)
Alt+Enter to invoke a quick fix or intention action, press the right arrow key to reveal the list of additional options.
To quickly review your recent changes to the project: Alt+Shift+C
Code Completion, you can accept the currently highlighted selection in the popup list with the period character (.), comma (,), semicolon (;), space and other characters.
Quickly move between methods in the editor: Alt+Up and Alt+Down
Ctrl+Shift+J shortcut joins two lines into one and removes unnecessary space to match your code style
Ctrl+Shift+V to choose and insert recent clipboard contents into the text
Inheritance hierarchy for a selected class: Ctrl+H
Right-clicking on a breakpoint marker you can quickly enable/disable the breakpoint or adjust its properties.
Evaluate the value of any expression while debugging the program, select its text in the editor (you may press a Ctrl+W a few times to efficiently perform this operation) and press Alt+F8.
Quickly evaluate the value of any expression while debugging the program, hold Alt and click this expression to see its value and calculate it, call a method, etc.
You can use the Extract Variable refactoring even on incomplete statements. Just select the necessary block in the editor and press Ctrl+Alt+V.
To open any particular method or field in editor: Ctrl+Alt+Shift+N
Add unimplemented methods: CTRL + I
Override methods: CTRL + O
Format code: CTRL + ALT + L
Show project: ALT + 1
Show logcat: ALT + 6
Hide project - logcat: SHIFT + ESC
Build: CTRL + F9
Build and Run: CTRL + F10
Alt+Shift+F10 access the Run/Debug dropdown on the main toolbar
Collapse all: CTRL + SHIFT + NumPad +
Expand all: CTRL + SHIFT + NumPad -
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TableRow TableLayout table row add delete remove removeview addview get table row index indexOfChild create table row dynamically TextView dynamically Android example
Main.java
main.xml ScrollView, TableLayout, TableRow, TextView Android xml layout example
Main.java
TableLayout table = (TableLayout)findViewById(R.id.table);
TableRow row = (TableRow)findViewById(R.id.row);
// get table row index android.
int nIndex = table.indexOfChild(row);
table.removeView(row); // invisible and height == 0
// add row into same place
table.addView(row, nIndex); // visible
// add row into certain position
table.addView(row, 3); // visible
// create new TableRow dynamically
TableRow tr = new TableRow(this);
tr.setLayoutParams(new LayoutParams(
LayoutParams.FILL_PARENT,
LayoutParams.WRAP_CONTENT));
// create own function for append TableRow
private void appendRow(TableLayout table) {
TableRow row = new TableRow(this);
TextView hLabel = new TextView(this);
hLabel.setText("Some text");
hLabel.setPadding(3, 3, 3, 3);
TextView hNextLabel = new TextView(this);
hNextLabel.setText("Next text");
hNextLabel.setPadding(3, 3, 3, 3);
hNextLabel.setGravity(Gravity.RIGHT | Gravity.TOP);
row.addView(hLabel, new TableRow.LayoutParams(1));
row.addView(hNextLabel, new TableRow.LayoutParams());
table.addView(row, new TableLayout.LayoutParams());
}
main.xml ScrollView, TableLayout, TableRow, TextView Android xml layout example
<ScrollView xmlns:android="//schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TableLayout
android:id="@+id/table"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TableRow>
<TextView android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Row index 0"/>
</TableRow>
<TableRow android:id="@+id/row">
<TextView android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Row index 1"/>
</TableRow>
<TableRow>
<TextView android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Row index 2"/>
</TableRow>
<TableRow>
<TextView android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Row index 3"/>
</TableRow>
</TableLayout>
</ScrollView>
Change table row background color if user click on row Android example code.
MainActivity.java
main.xml
strings.xml
MainActivity.java
public class MainActivity extends Activity {
Boolean bColorYellow = true;
TextView hTextView;
TableRow hTableRow;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
hTextView = (TextView)findViewById(R.id.idTextView);
hTableRow = (TableRow)findViewById(R.id.idTableRow1);
} // end onCreate
public void myTableRowClickHandler(View view) {
switch (view.getId()) {
case R.id.idTableRow1:{
if(bColorYellow){
hTableRow.setBackgroundColor(Color.GREEN);
bColorYellow = false;
}
else{
hTableRow.setBackgroundColor(Color.YELLOW);
bColorYellow = true;
}
}
break;
}
}
}
main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="//schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TableLayout android:layout_height="wrap_content" android:layout_width="fill_parent" android:id="@+id/tableLayout1">
<TableRow android:id="@+id/idTableRow1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#5655AA"
android:onClick="@string/myTableRowClick"
android:focusable="true">
<TextView
android:id="@+id/idTextView"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/hello"
/>
</TableRow>
</TableLayout>
</LinearLayout>
strings.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="hello">Hello World!</string>
<string name="app_name">TableRow</string>
<string name="myTableRowClick">myTableRowClickHandler</string>
</resources>
Environment.getExternalStorageDirectory()+ File.separator
AndroidManifest.xml
Boolean canWrite = Environment.getExternalStorageDirectory().canWrite() ;
if(canWrite){
File f = new File(Environment.getExternalStorageDirectory()
+ File.separator + "my_image.jpg")
f.createNewFile();
}else{
}
AndroidManifest.xml
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
Samsung Galaxy S II cena od 10 000 KCZ Kč (únor.2012).
Asi nejlepší smartphone (cena : vlastnosti) telefon s Androidem roku 2011.
Samsung Galaxy S II (GT-I9100) je chytrý telefon běžící na operačním systému Android, který byl představen firmou Samsung 13. února 2011.
Samsung Galaxy S II je (22.února2012) nejpoužívanějším chytrým telefonem u programu Sky Map viz tabulka.
Proč je Samsung Galaxy S2 tak oblíben?
Galaxy S II má 1.2 GHz dual-core "Exynos" procesor, 1 GB RAM, 10,8 cm WVGA AMOLED Super Plus displej a fotoaparát s 8 miliony pixelů i s bleskem a plné vysoké rozlišení 1080p nahrávání videa. Je to jedno z prvních zařízení, které nabízí mobilní high-definition Link (MHL), který umožňuje až 1080p nekomprimovaného obrazového výstupu HDMI. USB On-The-Go (USB OTG) je podporováno.
Vyměnitelná baterie na Galaxy S II vydrží až deset hodin při intenzivním používání, nebo dva dny lehčí provoz. Podle společnosti Samsung, Galaxy S II je schopen poskytovat 9 hodin hovoru v 3G a 18,3 hodin na 2G síti.
Samsung Galaxy S2 photo pic image
Zdroj obrázku: wikipedia
Asi nejlepší smartphone (cena : vlastnosti) telefon s Androidem roku 2011.
Samsung Galaxy S II (GT-I9100) je chytrý telefon běžící na operačním systému Android, který byl představen firmou Samsung 13. února 2011.
Samsung Galaxy S II je (22.února2012) nejpoužívanějším chytrým telefonem u programu Sky Map viz tabulka.
Proč je Samsung Galaxy S2 tak oblíben?
Galaxy S II má 1.2 GHz dual-core "Exynos" procesor, 1 GB RAM, 10,8 cm WVGA AMOLED Super Plus displej a fotoaparát s 8 miliony pixelů i s bleskem a plné vysoké rozlišení 1080p nahrávání videa. Je to jedno z prvních zařízení, které nabízí mobilní high-definition Link (MHL), který umožňuje až 1080p nekomprimovaného obrazového výstupu HDMI. USB On-The-Go (USB OTG) je podporováno.
Vyměnitelná baterie na Galaxy S II vydrží až deset hodin při intenzivním používání, nebo dva dny lehčí provoz. Podle společnosti Samsung, Galaxy S II je schopen poskytovat 9 hodin hovoru v 3G a 18,3 hodin na 2G síti.
Samsung Galaxy S2 photo pic image

Zdroj obrázku: wikipedia
onCreate in MainActivity.java
You can add to titlebar different Views by xml file.
custom_title.xml

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_CUSTOM_TITLE);
setContentView(R.layout.main.xml);
getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE, R.layout.custom_title);
}
You can add to titlebar different Views by xml file.
custom_title.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="//schemas.android.com/apk/res/android" android:id="@+id/screen"
android:layout_width="fill_parent" android:layout_height="fill_parent"
android:orientation="vertical">
<TextView android:id="@+id/left_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:text="Some text" />
<ImageView
android:id="@+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_alignParentRight="true"
android:src="@drawable/ic_launcher" />
</RelativeLayout>

Editace: 2015-11-09 15:04:31
Počet článků v kategorii: 396
Url:android-studio-list-of-useful-shortcuts
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