Android代码中动态添加布局


动态添加示例一：

public class MainActivity extends Activity {

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

final LinearLayout layout2 = new LinearLayout(this);

layout2.setOrientation(LinearLayout.VERTICAL);

Button btn1 = new Button(this);

Button btn2 = new Button(this);

btn1.setText("Button1");

btn2.setText("Button2");

layout2.addView(btn1);

layout2.addView(btn2);

setContentView(layout2);

btn1.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

setTitle("点击button1 ");

Button btn3=new Button(v.getContext());

layout2.addView(btn3);

btn3.setText("Button3");

}

});

}

}

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动态添加示例二：

public class MainActivity extends Activity {

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);



//ImageView添加到这个RelativeLayout下边

RelativeLayout rl_1 = (RelativeLayout)findViewById(R.id.rl_1);



//要被添加的ImageView

ImageView iv_1 = new ImageView(this);

iv_1.setImageResource(R.drawable.ic_launcher);

// iv.setId(110);//注意这点 设置id 特别注意的是设置id（imgApple2.setId(110);），方便在以后onclick监听事件中进行对应的处理

iv_1.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

Toast.makeText(MainActivity.this, "you clicked me", 0).show();

}

});

//添加时的布局参数设置

RelativeLayout.LayoutParams layoutParams_1 = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);

// layoutParams_1.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);

// layoutParams_1.setMargins(30, 50, 100, 100);

layoutParams_1.leftMargin=500;

layoutParams_1.topMargin = 500;

rl_1.addView(iv_1,layoutParams_1);











//ImageView添加到这个RelativeLayout下边

RelativeLayout rl_2 = (RelativeLayout)findViewById(R.id.rl_2);



//要被添加的ImageView

ImageView iv_2 = new ImageView(this);

iv_2.setImageResource(R.drawable.ic_launcher);

// iv.setId(110);//注意这点 设置id

iv_2.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

Toast.makeText(MainActivity.this, "you clicked me", 0).show();

}

});

//添加时的布局参数设置

RelativeLayout.LayoutParams layoutParams_2 = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);

// layoutParams_2.setMargins(30, 50, 100, 100);

layoutParams_2.leftMargin=40;

layoutParams_2.topMargin = 400;

rl_2.addView(iv_2,layoutParams_2);



}

}

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动态添加示例三：

public class MainActivity extends Activity {

/** Called when the activity is first created. */

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);



//设置布局

setContentView(R.layout.activity_main);



//自定义的带提示文本的EditText组件

EditText ed = new EditText(this);

ed.setHint("请输入。。。。。。。。");



//设置从左边140px处开始输入文本

ed.setPadding(140, 0, 0, 0);



//向如下relativeLayout这个布局中动态添加一个EditText

RelativeLayout relativeLayout = (RelativeLayout) findViewById(R.id.rl_2);



//创建一个LayoutParams对象

RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,

ViewGroup.LayoutParams.WRAP_CONTENT);



//设置android:layout_below属性的值

layoutParams.addRule(RelativeLayout.BELOW, R.id.et_inner);

//动态添加EditText

relativeLayout.addView(ed, layoutParams);



}

}

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动态添加示例（综合《很好》）：

public class MainActivity extends Activity {



private static int id = 100;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);



final LinearLayout lin = (LinearLayout) findViewById(R.id.list_Lin);

LinearLayout.LayoutParams LP_FW = new LinearLayout.LayoutParams(

LinearLayout.LayoutParams.FILL_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT);

RelativeLayout newSingleRL=new RelativeLayout(this);



for(int i=0;i<10;)

{

newSingleRL=generateSingleLayout(id,"第"+(++i)+"个动态列表");

lin.addView(newSingleRL,LP_FW);//全部用父结点的布局参数

}





// final LinearLayout root = (LinearLayout) findViewById(R.id.layout_root); //获取总根结点

// setContentView(root); //这里必须是总根结点

}

/**

* 新建一个列表item

* @param imageID 新建imageView的ID值

* @param str TextView要显示的文字

* @return 新建的单项布局变量

*/

private RelativeLayout generateSingleLayout(int imageID,String str)

{



//最外层相对布局：其他（一个LinearLayout，一个ImageView）都会添加在此布局内部。

RelativeLayout layout_root_relative=new RelativeLayout(this);



//ImageView被添加在最外层layout_root_relative的右边：params.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);

ImageView imageView = new ImageView(this);



//out.1

RelativeLayout.LayoutParams RL_WW = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT,

RelativeLayout.LayoutParams.WRAP_CONTENT);

imageView.setPadding(5, 5, 5, 5);

RL_WW.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);

imageView.setLayoutParams(RL_WW);

imageView.setClickable(true);

imageView.setId(imageID);

imageView.setImageResource(R.drawable.plus);



layout_root_relative.addView(imageView);



//>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>





//LinearLayout被添加在最外层layout_root_relative里边，并且在ImageView的左边:params.addRule(RelativeLayout.LEFT_OF,imageID);

LinearLayout layout_sub_Lin=new LinearLayout(this);

layout_sub_Lin.setBackgroundColor(Color.argb(0xff, 0x00, 0xff, 0x00));

layout_sub_Lin.setOrientation(LinearLayout.VERTICAL);

layout_sub_Lin.setPadding(5, 5, 5, 5);





//TextView是被添加在最外层layout_root_relative内部的LinearLayout里边

TextView tv = new TextView(this);



//inner.1

LinearLayout.LayoutParams LP_WW = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT,

LinearLayout.LayoutParams.WRAP_CONTENT);

tv.setText(str);

tv.setTextColor(Color.argb(0xff, 0x00, 0x00, 0x00));

tv.setTextSize(20);

tv.setLayoutParams(LP_WW);



layout_sub_Lin.addView(tv);









//out.2

RelativeLayout.LayoutParams RL_MW = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT,

RelativeLayout.LayoutParams.WRAP_CONTENT);//尤其注意这个位置，用的是父容器的布局参数

RL_MW.setMargins(5, 5, 150, 5);

RL_MW.addRule(RelativeLayout.LEFT_OF,imageID);



layout_root_relative.addView(layout_sub_Lin,RL_MW);



//>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

return layout_root_relative;



}

}

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动态添加：尺码，颜色，容量，可以使用这里（很好）

public class MainActivity extends Activity {

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

DisplayMetrics dm = new DisplayMetrics();

getWindowManager().getDefaultDisplay().getMetrics(dm);

int width = dm.widthPixels;

// int height = dm.heightPixels;

// 自定义layout组件

RelativeLayout layout = new RelativeLayout(this);

// 这里创建16个按钮，每行放置4个按钮

Button Btn[] = new Button[14];

int j = -1;

for (int i = 0; i < Btn.length; i++) {

Btn[i] = new Button(this);

Btn[i].setId(2000 + i);

Btn[i].setText("按钮" + i);

RelativeLayout.LayoutParams btParams = new RelativeLayout.LayoutParams(

(width - 50) / 4, 100); // 设置按钮的宽度和高度

if (i % 4 == 0) {

j++;

}

btParams.leftMargin = 10 + ((width - 50) / 4 + 10) * (i % 4); // 横坐标定位

btParams.topMargin = 20 + 100 * j; // 纵坐标定位

layout.addView(Btn[i], btParams); // 将按钮放入layout组件

}

this.setContentView(layout);



// 批量设置监听

for (int k = 0; k <= Btn.length - 1; k++) {

// 这里不需要findId，因为创建的时候已经确定哪个按钮对应哪个Id

Btn[k].setTag(k); // 为按钮设置一个标记，来确认是按下了哪一个按钮

Btn[k].setOnClickListener(new Button.OnClickListener() {

@Override

public void onClick(View v) {

int i = (Integer) v.getTag(); // 这里的i不能在外部定义，因为内部类的关系，内部类好多繁琐的东西，要好好研究一番

Toast.makeText(MainActivity.this, "count = " + i,

Toast.LENGTH_SHORT).show();

}

});

}

}

}

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一种思路：

通过使用LayoutInflater 每次点击按钮时候去读取布局文件，然后找到布局文件里面的各个VIEW 操作完VIEW 后加载进我们setContentView 方面里面的要放的布局文件里面，

每次动态加载文件必需 调用 removeAllViews方法，清除之前的加载进来的 View 。

public class MainActivity extends Activity {

/** Called when the activity is first created. */

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);//上边一个线性布局，里边左右各一个按钮，。下边一个线性布局，当点击上边的线性布局里边的左右按钮时，此处的内容改变。

final LayoutInflater inflater = LayoutInflater.from(this);

Button btn = (Button) findViewById(R.id.Button01);

Button btn2 = (Button) findViewById(R.id.Button02);

final LinearLayout lin = (LinearLayout) findViewById(R.id.LinearLayout01);//下边的线性布局

btn.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

View view = View.inflate(MainActivity.this, R.layout.listview, null); //listview.xml里边根节点一个线性布局（感觉有点多余），线性布局里边一个listview

LinearLayout ll = (LinearLayout) view.findViewById(R.id.layout);



ListView lv = (ListView) ll.getChildAt(0);

lv.setAdapter(new listAdapter(MainActivity.this));

lin.removeAllViews();

lin.addView(ll);





// LinearLayout layout = (LinearLayout) inflater.inflate(R.layout.listview, null).findViewById(R.id.layout);



// ListView lv = (ListView) layout.getChildAt(0);

// lv.setAdapter(new listAdapter(MainActivity.this));

// lin.removeAllViews();

// lin.addView(layout);

}

});

btn2.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

LinearLayout layout = (LinearLayout) inflater.inflate(

R.layout.hello, null).findViewById(R.id.hellolayout); //hello.xml里边根节点是一个线性布局（感觉有点多余），线性布局里边一个textview

TextView lv = (TextView) layout.getChildAt(0);

lv.setTextColor(Color.RED);

lin.removeAllViews();

lin.addView(layout);

}

});

}

}