流式布局 实现搜索框

public class FlowLayout extends ViewGroup { public FlowLayout(Context context) { this(context,null); } public FlowLayout(Context context, AttributeSet attrs) { this(context, attrs,0); } public FlowLayout(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); } @Override protected void onLayout(boolean changed, int l, int t, int r, int b) { measureChildren(0,0); int totalWidth = 0; int totalHeight = 0; for (int i = 0; i < getChildCount(); i++) { View view = getChildAt(i); if (totalWidth + view.getMeasuredWidth() >= getMeasuredWidth()) { totalWidth = 0; totalHeight += view.getMeasuredHeight(); } view.layout( totalWidth, totalHeight, totalWidth + view.getMeasuredWidth(), totalHeight + view.getMeasuredHeight()); totalWidth += view.getMeasuredHeight(); } }}

• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10
• 11
• 12
• 13
• 14
• 15
• 16
• 17
• 18
• 19
• 20
• 21
• 22
• 23
• 24
• 25
• 26
• 27
• 28
• 29
• 30
• 31
• 32
• 33
• 34
• 35
  

public class MainActivity extends AppCompatActivity implements View.OnClickListener { private EditText et_text; private Button btn_add; private Button btn_decrease; private FlowLayout flow; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); initView(); } private void initView() { et_text = (EditText) findViewById(R.id.et_text); btn_add = (Button) findViewById(R.id.btn_add); btn_decrease = (Button) findViewById(R.id.btn_decrease); flow = (FlowLayout) findViewById(R.id.flow); btn_add.setOnClickListener(this); btn_decrease.setOnClickListener(this); } @Override public void onClick(View v) { switch (v.getId()) { case R.id.btn_add: addHistory(); break; case R.id.btn_decrease: flow.removeAllViews(); break; } } private void addHistory() { TextView txt = new TextView(this); String s = et_text.getText().toString(); if (!TextUtils.isEmpty(s)) { txt.setText("" + s);// Toast.makeText(this,""+txt.getText(),Toast.LENGTH_LONG).show(); txt.setPadding(15, 15, 15, 15); flow.addView(txt); } } private void submit() { // validate String text = et_text.getText().toString().trim(); if (TextUtils.isEmpty(text)) { Toast.makeText(this, "text不能为空", Toast.LENGTH_SHORT).show(); return; } }}

• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10
• 11
• 12
• 13
• 14
• 15
• 16
• 17
• 18
• 19
• 20
• 21
• 22
• 23
• 24
• 25
• 26
• 27
• 28
• 29
• 30
• 31
• 32
• 33
• 34
• 35
• 36
• 37
• 38
• 39
• 40
• 41
• 42
• 43
• 44
• 45
• 46
• 47
• 48
• 49
• 50
• 51
• 52
• 53
• 54
• 55
• 56