关于图片选择器和图标定位的作业

关于图片选择器和图标定位

1,这是图片选择器

因为开始不太会如何在xml中去定义字体滚动，所以算是参考了网上的代码

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这是Java部分的代码

package com.example.kimdemon.dt;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageView;
import android.widget.RadioButton;
import android.widget.RadioGroup;

public class MainActivity extends AppCompatActivity {
 private ImageView yf_a;
 private RadioGroup yf_2;
 private RadioGroup yf_8;
 private RadioGroup yf_5;
 private RadioButton yf_4;
 private RadioButton yf_6;
 private RadioButton yf_7;
 private RadioButton yf_9;
 private RadioButton yf_3;
 private RadioButton yf_10;
 @Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    yf_a = (ImageView) findViewById(R.id.yf_a);
    yf_2=(RadioGroup) findViewById(R.id.yf_2);
    yf_5=(RadioGroup) findViewById(R.id.yf_5);
    yf_8=(RadioGroup) findViewById(R.id.yf_8);
    yf_3=(RadioButton) findViewById(R.id.yf_3);
    yf_4=(RadioButton) findViewById(R.id.yf_4);
    yf_6=(RadioButton) findViewById(R.id.yf_6);
    yf_7=(RadioButton) findViewById(R.id.yf_7);
    yf_9=(RadioButton) findViewById(R.id.yf_9);
    yf_10=(RadioButton) findViewById(R.id.yf_10);

    yf_3.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            if (yf_3.isChecked()){
                yf_a.setImageResource(R.drawable.a);
                no1();
            }

        }
    });
    yf_4.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            if (yf_4.isChecked()){
                yf_a.setImageResource(R.drawable.b);
                no1();
            }
        }
    });
    yf_6.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            if (yf_6.isChecked()){
                yf_a.setImageResource(R.drawable.c);
                no2();
            }
        }
    });
    yf_7.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            if (yf_7.isChecked()){
                yf_a.setImageResource(R.drawable.d);
                no2();
            }
        }
    });
    yf_9.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            if (yf_9.isChecked()){
                yf_a.setImageResource(R.drawable.e);
                no3();
            }
        }
    });
    yf_10.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            if (yf_10.isChecked()){
                yf_a.setImageResource(R.drawable.f);
                no3();
            }
        }
    });

}
void no1(){
    yf_3.setChecked(false);
    yf_4.setChecked(false);
}
void no2(){
    yf_6.setChecked(false);
    yf_7.setChecked(false);
}
void no3(){
    yf_9.setChecked(false);
    yf_10.setChecked(false);
}
}

而运行后的效果则是这样的

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2,这是图标地图

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这是Java部分的代码

package com.example.kimdemon.dd;


import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.widget.ImageView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {
 private ImageView yf;
 private long time;
 @Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    yf = (ImageView) findViewById(R.id.yf);
}

@Override
public boolean onTouchEvent(MotionEvent event) {
    if (event.getAction()==MotionEvent.ACTION_DOWN){
        String pos= "";
        float x= event.getX();
        float y =event.getY();
        yf.setPadding((int)x-100,(int)y-300,0,0);
        pos="x轴坐标"+x+"y轴坐标"+y;
        Toast.makeText(this,pos,Toast.LENGTH_SHORT).show();
    }
    return super.onTouchEvent(event);
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    if(event.getKeyCode()==KeyEvent.KEYCODE_BACK){
        exit();
        return false;
    }
    return super.onKeyDown(keyCode, event);
}

void exit(){

    if(System.currentTimeMillis()-time>2000){
        Toast.makeText(this,"确定退出!",Toast.LENGTH_SHORT).show();
        time=System.currentTimeMillis();
    }else {
        finish();
    }
}
}  

运行结果如下